Malicious PDF — malware analysis report

Static analysis result for SHA-256 785bb34ccdd7d141…

MALICIOUS

PDF

42.1 KB Created: 2020-09-11 02:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 670e4d59cc4c8e58c5775682f2dd5cf7 SHA-1: 6b4972076912b80a006271dfbd64a1b742a815ef SHA-256: 785bb34ccdd7d141b6568f56b472227b9596db6ea692d752c87f268361d8e5d9
140 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link and a PDF link farm, indicating an attempt to lead the user to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link found in the heuristics. The presence of numerous embedded links to external PDFs further supports the attack pattern of a link farm designed to obscure the ultimate destination or to distribute malicious content. The heuristic 'SE_CALLBACK_LURE' suggests a potential social engineering pretext for the user to interact with the document's links.

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.
  • 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
  • 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.club/wix?keyword=ambulance+mp4+song
    • http://files.jesusandbeauty.com/uploads/1/3/0/8/130874266/869453.pdf
    • http://napabuluf.skyfieldtropical.org/uploads/1/3/0/7/130775162/b98991271.pdf
    • http://files.stevenhoy.com/uploads/1/3/1/0/131069764/kopapasobuve.pdf
    • http://files.live-arts.co.uk/uploads/1/3/1/1/131164033/6247e959a.pdf
    • https://static.usrfiles.com/ugd/fafc38_04f535eba7844e869296d1cf697008cb.pdf
    • https://static.usrfiles.com/ugd/d48fe3_64f64c9a267f4676ab9dfd24482e79b7.pdf
    • https://static.usrfiles.com/ugd/115d6e_de0200dc25914d7aa9a696703202668b.pdf
    • https://static.usrfiles.com/ugd/857e61_99429ea2bc2c4bbebb6ad24f94acdf54.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/ponesezib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/keladaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/40037310486.pdf
    • https://cdn.shopify.com/s/files/1/0437/4904/8474/files/flejadora_automatica_manual.pdf
    • https://static.usrfiles.com/ugd/e3834b_019c1e1e4bf74289a8ef882982d358ef.pdf
    • https://static.usrfiles.com/ugd/fc3b0b_d63f7a385e1f4135a04f38becbac0a47.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_off00006595.bin
87c614387554f9dae93fba1dadeeb761873cc5234d44a09395a96b0ba1605544
pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 5372 bytes
font_01_sfnt_off000077d0.bin
a2c70edb3edcb3a275c61bf6c993dd7195a12cb9f7923b82e48c0ed8b44946f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D0 10488 bytes