Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68e05c982390688…

MALICIOUS

PDF

43.7 KB Created: 2020-10-26 19:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2fe66884b9b96e3bf424080184743b4f SHA-1: e7a3d4677dde85794233f8fc3a1f8483faec57c9 SHA-256: a68e05c982390688ed9f152e5a9bd1814c4b2d6d93acc060c01c5f21ce369099
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a game-related keyword. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this. Additionally, the PDF acts as a link farm, with many embedded URLs pointing to external PDFs, some of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/123?keyword=destiny+2+edz+lost+sectors+map In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f93f15f817ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f88cbe9f0278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f8762eb75ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8b04ff9209c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5f8bfb12abfc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f8975f3b8f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f92898861c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5f96ef667ba77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8db53292731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f8e0d2e192a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f89aa2d115bc.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/1/0431/1144/8729/files/tepumitoxariki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1155/3473/files/onomatopoeia_worksheet_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/marshall_county_schools_tn_twitter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/three_ways_to_persuade_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/41013184254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d5b3ce-19de-4215-815b-e9f0094e0701/zofuriloguti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b89ee64-bc4a-4a25-8204-966e01c4fd71/setizibipubomita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f48f42fb-5b70-4753-ac23-df27ea1175c2/55272738183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ce8d02-3dc5-4044-b32a-a18e00d34b4d/regerun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fb5db0-e84c-4374-ab20-a7ea2d43daab/vujibanogofiwuli.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_off00006c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C57 5500 bytes
SHA-256: 91d1035f1cafecf8550aec33b5f6835d03c88c855d08fe1163995fb34f7f9b17
font_01_sfnt_off00007f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F03 10204 bytes
SHA-256: 740520e209fccfcedb6939f0f7abcc1ffe458130b903bc27fc74e9c4a1efe0d0

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