Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9088b0df649a885…

MALICIOUS

PDF

35.3 KB Created: 2020-09-01 12:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffa5823f3d7f44cee01e76cb0ee4f84d SHA-1: ecee17de303b1bc2a2df3172fd368a1d69b96314 SHA-256: c9088b0df649a8857671b5db8fb72822f09a326b75d9c9e6287f70bfc13e4b65
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and appears to be a lure, possibly for a phishing or malware distribution campaign. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic.

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.ru/wix?keyword=brakeman+report+1998
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/wunapugebaseputitomaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/40034876448.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/tanuzanunuvugegoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/luginojiru.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/6164050720.pdf
    • https://static.usrfiles.com/ugd/b5aed9_7772b130c3654733aa002006852b2284.pdf
    • https://static.usrfiles.com/ugd/451461_9c9dd8c4bf814412b912eae67ec31273.pdf
    • https://static.usrfiles.com/ugd/67e251_92ad876419dd4d47aba54b283804fb52.pdf
    • https://static.usrfiles.com/ugd/c0fca2_29d876c4d6954fbd99b0c3572c836539.pdf
    • https://static.usrfiles.com/ugd/b50c55_0bf021178d4341b99c312f392b185aff.pdf
    • https://static.usrfiles.com/ugd/10e3af_5a660d19afb54164a53cf0ac26298879.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a197002e1a48ee833a6cc440b77a39.pdf
    • https://static.usrfiles.com/ugd/9b33c5_d3ec41d41a2e4759990d886855986335.pdf
    • https://static.usrfiles.com/ugd/a107db_bf632495e36f43dc9a99a6f21d1f481e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/60700573186.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/facebook_cover_photo_template_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0586/files/symmetry_worksheets_for_grade_3.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_off00004c28.bin
506640114e0ab02c2fe718427fc0dd27e0d5c212d9aaf954a87d6fa084e57eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C28 5272 bytes
font_01_sfnt_off00005e06.bin
26de7fb62aeb2723957e0d6715ca99508e7a4439a5a5bb40523649ea94e303d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E06 10088 bytes

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