Malicious PDF — malware analysis report

Static analysis result for SHA-256 e202b8853b6921e6…

MALICIOUS

PDF

49.0 KB Created: 2020-10-16 16:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 51d26ce8f327612eca431cc095dec49b SHA-1: 282377108dac2db249f9110e80f462bfc28e8110 SHA-256: e202b8853b6921e6760d102977f6b78fe9ccfdd31df78399145536bc82d92582
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. Although no scripts were extracted, the embedded URL `https://ggtraff.ru/123?keyword=tekken+tag+ppsspp+android+download` is flagged as a malicious redirector, likely leading to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=tekken+tag+ppsspp+android+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f874d8d353cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87348ca4ecc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b21f3a2b-a31a-444d-8eaa-9b83241daa03/80861378891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02511933-aceb-4517-8e01-6496587d9af1/mixemaleride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f42a7b-0d86-4d9e-822b-f1eda2e4d534/pomiwipopafapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fc89f7-2ae2-4cc1-a732-41114d28db97/83410926265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0a8ba3-b254-4476-bbc7-9e5dce162479/sekusimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6322/5767/files/java_swing_using_netbeans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/stoichiometry_volume_to_volume_problems_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/xeponatarinitexopugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6328/6691/files/briggs_and_stratton_service_manual_for_out_of_production_engines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/korean_drama_downloader_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/42129207008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6929/3215/files/mofogatarozowoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed667ae0-bc31-45f2-8b6c-cdd26c84f85d/kerivuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9853e09-6d68-4946-afd7-c412b783661c/17240350049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b511c9c5-30d2-443b-842b-d476762e79ac/62067236355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07293e00-d930-431f-98f5-64848a779ef5/2361504022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7adaefa-8fed-4298-8dd2-644d165af20b/94883786671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1828550-c60b-403a-8173-ab39b77597a6/261259047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30572576-77f5-48f3-aa0d-781f94249eea/73643005218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5632d285-6892-4470-87b6-33f92b6d7859/33888511576.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 4512 bytes
SHA-256: bfb6d2c29f87b1b426635c96f2973573c48aa58f6241e1d666458e6e1f081ee6
font_01_sfnt_off00007374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 5020 bytes
SHA-256: 2c42287c918bdf0e8cf5a4f7585f1b8becb9da477719a8d8cd39f7cff655af7a
font_02_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 10224 bytes
SHA-256: 48a0ee8c18ffaae283d674321a18000faffffb690016f5e825cec0a732bf3e92
font_03_sfnt_off0000a796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA796 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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