Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2c44980281654e…

MALICIOUS

PDF

55.3 KB Created: 2020-08-03 02:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daf66b4c9e385301491bb58a7fa80f04 SHA-1: f6ee1294ed6d10e18f5f958dc39f0df8a9ea0e55 SHA-256: 6d2c44980281654e6425315c9da6386923f2692478423a0b6d94bbd2b834eee1
174 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.com, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains text related to a 'yoga outlet coupon' and a URL that appears to be part of a link farm, suggesting a phishing or scam lure. The ML classifier strongly indicates 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=yoga+outlet+coupon
    • http://files.firstspeakers.ca/uploads/1/3/0/9/130969139/6140092.pdf
    • http://files.shesprettycrafty.net/uploads/1/3/2/7/132710491/faxovodonoroxufokad.pdf
    • http://files.thenorthwoodsnews.com/uploads/1/3/0/8/130874043/4747433.pdf
    • http://files.liic.org/uploads/1/3/0/7/130738719/tasowog.pdf
    • http://files.susieandnathanmusic.com/uploads/1/3/2/7/132740377/zupobapol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupuxisupevijerabufogete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007792176.pdf
    • https://cdn.shopify.com/s/files/1/0437/3023/9637/files/vevudanorawexodiravoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/south_park_minecraft_episode.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/lasasovobalafozeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0519/files/88327867362.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/17458800129.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/96963618003.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/39659251885.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3186/files/4501836601.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/87983271536.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/37068026358.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099f2.bin
929e64e6d93e9317eadddf9a923a2183103dd9464316bea5375fcc4f1473ab31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F2 4788 bytes
font_01_sfnt_off0000aa58.bin
a51ae14ed251181d6e0eb342103357f051a8e2cb8d8b0187730553c887209b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA58 11080 bytes

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