Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a61a33ca44dbb4…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 06:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 469884020487feaf4263df6e725376b8 SHA-1: 1547ca947d3eabc740ca7f6c24b610cd2b065a9d SHA-256: 75a61a33ca44dbb451eee6d751f04fee1dfa7d79802acd9f0ffcbc6feceaeef0
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=forest+of+the+blue+skin+wiki'. Another heuristic flagged a mass external PDF link farm, with 'https://cdn.shopify.com/s/files/1/0430/6891/5863/files/makakog.pdf' being the first identified URL. The document body contains garbled text and embedded URLs, further supporting the link farm and redirection attack pattern.

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=forest+of+the+blue+skin+wiki
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/makakog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/sojaguzunex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2301/files/toefl_test_preparation_kit.pdf
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/ditokolibododawujelepodix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0793/files/lujesug.pdf
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/96008164711.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/83923327048.pdf
    • https://static.usrfiles.com/ugd/e02969_f7337ef88c444ee9be27b1358a1c7e0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dd701a1a1a34f57acba642faf80095b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b023001898134fe8b6c924ffb909eb18.pdf
    • https://static.usrfiles.com/ugd/0dd040_5d2496f6899f48c59b5ca2ed2f8227b5.pdf
    • https://static.usrfiles.com/ugd/edb4a7_65fb7a953e1c4e709c8ee1dbfbd149fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_007c84f8449f45b1aed9b09d4a4f3800.pdf
    • https://static.usrfiles.com/ugd/7f929b_06c0f5ee4eb14fe2a3a175e0b85f7dce.pdf
    • https://static.usrfiles.com/ugd/834936_974dea95a2d44b96bb4ca0c765b40a57.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ad.bin
5adbfcbd70f978d560112aec78b4efc743475540f0fa95f98c1fd26784d590c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x54AD 4896 bytes
font_01_sfnt_off00006568.bin
2ab8c280bf1c445822ecb9ad276708ba766b3ec94f1e942016ea78274bdbd1c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 9936 bytes
font_02_sfnt_off000087a2.bin
1bbfed8e334bb90a5f9d7804257786d4ae38288f3118609b7815268b8043fba5
pdf-font-stream PDF embedded font (sfnt) at offset 0x87A2 16036 bytes