Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cc6e6080bac699…

MALICIOUS

PDF

41.6 KB Created: 2020-08-06 03:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af2d012868ddfa0586361f84eab46337 SHA-1: ed2a9f19ade1cf9364a9db31344639252bbbeac2 SHA-256: b3cc6e6080bac6998ab02dae6faf43a0498202be182222f85ef8f128dffe4c54
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL that triggers the malicious redirect. This suggests a phishing or social engineering attempt to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=bremer+stadtmusikanten+text+pdf
    • http://fizij.soulsinfriendship.org/uploads/1/3/2/7/132740978/kepof.pdf
    • http://files.whispergathering.com/uploads/1/3/1/8/131856039/9311032.pdf
    • http://files.troop3mbts.com/uploads/1/3/1/4/131453897/zijuzedebovexaz_jefuzov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/honda_pilot_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/toki_fist_of_the_north_star.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/mazozijuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5547/3059/files/25083381326.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/86382484245.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/parusedisaxaniriv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/46482394632.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/lobibumebefazamuzilawe.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_off00006405.bin
7f507f844b22a68aa0b1c7e43f3b84f8c1edbadf26ac434c2c146f717a468f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 5336 bytes
font_01_sfnt_off0000761b.bin
247407037a508a7231ebfe32ee260a299d98aa1c67c2d71f7553f60bd027c2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 10540 bytes

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