Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fa545ef9d96432…

MALICIOUS

PDF

39.3 KB Created: 2020-07-25 17:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7479da6d960e5592882acc6cbf1477db SHA-1: 4eb5024433d7c1ee828b064d2147a0101e10fcd7 SHA-256: 79fa545ef9d964327b85a196393815c2807f9a3e4186fe0cd80de86af7341e2f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is presented within the document body, disguised as an academic exercise. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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/pify?keyword=reported+speech+indirect+questions+exercises
    • http://files.stanleyferrymarina.com/uploads/1/3/0/9/130969204/wowew_rewefadomap_wavokosepu.pdf
    • http://files.stayinthearena.com/uploads/1/3/1/3/131380467/1887699.pdf
    • http://files.activitpt.com/uploads/1/3/0/7/130739016/fasotumi-laluze-petetu.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/18844725970.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/xobevetanidudaturusoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/julakavaxewuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/nutetepapigelagisugut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/97054909908.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/20807319066.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/gulet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/80358754264.pdf
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/72939663014.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/88949157592.pdf
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/56904964908.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d83.bin
14e2ceb0963013bc971fdac8ea89e4f73b64945a38fd3f29d747ef773f19b969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5000 bytes
font_01_sfnt_off00006e87.bin
55eddc9e7a203b3aa2bae19892b51ae4be8dff2ef3555d895b7fdb009fbf76c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 9776 bytes

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