Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6a169d6af02b8f…

MALICIOUS

PDF

45.3 KB Created: 2020-09-01 21:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3ef7ed72b15770fb7f0efcaf2230915 SHA-1: d4719ca4471e4e3b6597faf61d71cf479a22959e SHA-256: 8a6a169d6af02b8ff8309c08e90104f1745c1834f1d655ea558168541be37c7d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=fallout+4+weapons+crafting+guide'. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Fallout 4 weapons crafting guide". The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to mask the malicious redirector.

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.cc/wix?keyword=fallout+4+weapons+crafting+guide
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/fluke_t5-_600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6087/7729/files/animals_worksheet_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/53334864574.pdf
    • https://static.usrfiles.com/ugd/b8c837_627f96bf1c454a9d8d855841d8b2b7e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4098010cd0c34d6f9a8e89cd7886b137.pdf
    • https://static.usrfiles.com/ugd/33a16d_a5fe86fda57c471c8fb27add9f0485fb.pdf
    • https://static.usrfiles.com/ugd/6fd45c_a5e6ce08b00d4b0ebbc005b14600ef1a.pdf
    • https://static.usrfiles.com/ugd/277b62_3287082fd34d4e0bb1ce00e93a687708.pdf
    • https://static.usrfiles.com/ugd/9904c2_3aa9bfd2f9ce4e369c786dc930e790f6.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_39a93f5254464174827ce0de59195c35.pdf
    • https://static.usrfiles.com/ugd/70c1f8_241e3d321465495cac1e9b38c5935b4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7a807859dc34f56aad9b7afb7e94efb.pdf
    • https://static.usrfiles.com/ugd/8cbfce_dc96ea1127dd4cc7944d7967673cd80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_16ebe99b704746ec9d98455de98a22e5.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_off00007330.bin
72db7e4e215f7e44fdb9be9edff5f75c94c94cb0a25d54c38d2be9c8649ce4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 5456 bytes
font_01_sfnt_off000085ed.bin
808036101fa282a92d1b7a6edb3e141c1508ac67534440fa1234d348c9b69068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85ED 10080 bytes

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