Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffb32a258941df9…

MALICIOUS

PDF

35.1 KB Created: 2020-08-31 20:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f17a825f1b39f9ef64dea04caa2d129 SHA-1: 21dfa8f99357b23f01e92b164d46f40a5b2974dd SHA-256: 4ffb32a258941df94201b4083a21844db5b7ed4f1395051df0dff48c9af6bedc
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, identified as a PDF SEO link farm. One of these links, 'https://ttraff.cc/wix?keyword=hadoop+the+definitive+guide+filetype+pdf', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this malicious URL and numerous other benign-looking PDF links, suggesting an attempt to manipulate search engine results or trick users into navigating to malicious sites.

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/wix?keyword=hadoop+the+definitive+guide+filetype+pdf
    • https://static.usrfiles.com/ugd/b8c837_b0e989ece0c043408877d2cb320f75f9.pdf
    • https://static.usrfiles.com/ugd/097bd5_ea51f3b3e2f64ec19364612c71160a01.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73295986d444f3382ac896738b636b8.pdf
    • https://static.usrfiles.com/ugd/9904c2_6d9489ef188344e18bbb12c1be401a46.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/63658020108.pdf
    • https://cdn.shopify.com/s/files/1/0437/7909/6728/files/33039391370.pdf
    • https://cdn.shopify.com/s/files/1/0448/5667/2418/files/convex_hull_python.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/calendario_escolar_castilla_la_mancha.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/which_harry_potter_character_are_you.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/tiwonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/powerpoint_viewer_2010.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/brand_ambassador_contract_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/61463773003.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/ladevifovo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/97176987688.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/jabimasiwubaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/private_security_guard_training_manual.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_off00004c82.bin
99a2c1a8e6f3cf2697b2989494af139a4d74dada1c194db35c94d1a378cfca17
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C82 5152 bytes
font_01_sfnt_off00005e21.bin
20f38bc060c0f3993e90c342ef31dad98b26af86ebbe85832210f39b01a691fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 9696 bytes