Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a838224bf46caf…

MALICIOUS

PDF

43.9 KB Created: 2020-10-15 19:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 931f773db30cfedb82d3e1b4a48815a8 SHA-1: 5c17d45b9e478c00802996b580d4d51c1fc0d0dc SHA-256: 32a838224bf46cafeccd0c376ab59339bc63dcf80296f1586f6e7b764f7bf10f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. This URL is likely used to funnel victims to a phishing page or to download a second-stage payload. The presence of a large number of external links, many pointing to benign Shopify URLs, suggests a link farm SEO tactic to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.club/pify?keyword=backtrack+5+linux+installer+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f872ff2dbff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8815e75b189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/88197646317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9383/9009/files/ryobi_impact_wrench_torque.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3671/2346/files/hurt_feelings_form_funny.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/23554367121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7487/2006/files/8751875846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/doctor_who_donna_wedding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6363/9703/files/bella_ice_cream_maker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1686/5952/files/monster_culture_seven_theses_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7609/1551/files/kisidarokodomuxixefadotik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f724d1be-e960-44ee-ad60-5648f4be7821/95306677247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be40de1e-6dce-42c6-af21-428f6cc9fb4c/38988408103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/falitagilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/delta_19922-sssd-dst_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6150/1848/files/origami_star_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/xotemejadulerenasofuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2732/8935/files/ozzy_osbourne_black_rain_tour_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0f3e82-4241-4894-97a5-22b9ff26303f/vagagakoguremew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00543157-6fb7-42de-8db3-35508ec848b2/52800741795.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7B 5464 bytes
SHA-256: 8a7580ca9598cbc0a8f5f57f1bacca7c569fe9113347d766017b5df8f7a9376a
font_01_sfnt_off00007e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E32 10604 bytes
SHA-256: 6f31aa512a53864f7655749394582736743d0adf4517a45246697b25f991c760

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