Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43a8304d17d8227…

MALICIOUS

PDF

47.7 KB Created: 2020-08-29 19:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef5842b23fe6b3f1e3608c342cbe265f SHA-1: 065629ca101f413433eef2130a6df6fecae93e0f SHA-256: d43a8304d17d82276f0f1ab61e88bd749d7ee829628a1483fccf693c012b3714
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded links pointing to external PDFs. The primary malicious URL identified is https://ttraff.com/wix?keyword=neverwinter+scourge+warlock+beginner+guide, which is likely used to lure victims into a phishing or malware distribution scheme.

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.com/wix?keyword=neverwinter+scourge+warlock+beginner+guide
    • https://cdn.shopify.com/s/files/1/0459/6229/7504/files/39860911717.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/bookbinding_sewing_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/1497/9737/files/seluzusugarodoriketabix.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/busukubaxuki.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/lolimarafugukifunikad.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/gorag.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/interview_questions_and_answers_for_financial_analyst_position.pdf
    • https://static.usrfiles.com/ugd/b8c837_897c27c9596f43bc9bb8ce3bb61fcd37.pdf
    • https://static.usrfiles.com/ugd/b8c837_053808e8de0a4b62b6f65f7f8946bbac.pdf
    • https://static.usrfiles.com/ugd/b8c837_7308ee4b571447b4aa1357ab9ffdc422.pdf
    • https://static.usrfiles.com/ugd/b8c837_4db56a3895fa4965a81bf66695c320eb.pdf
    • https://static.usrfiles.com/ugd/93c935_19b531a975e84f698789ed296dc62f30.pdf
    • https://static.usrfiles.com/ugd/0789d5_ddee59f7f7ca460b9b6a204e8bb3aea8.pdf
    • https://static.usrfiles.com/ugd/b8c837_de08946a9d27462793c77bec0e9c467d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f01ff7c3d394347bf32dd19df69c6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aae4917859e4932aac2d8b100caaea6.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f55.bin
40f7babc87f3ef61d671971707fadade725436d368d41ad4a52ce4bf8d77742a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F55 5316 bytes
font_01_sfnt_off00008184.bin
100d45178744fdac4cf0c78e0164d8f8b5bc61f072292facb2ef59a3c3ed9550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8184 9844 bytes
font_02_sfnt_off0000a345.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA345 4324 bytes

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