Malicious PDF — malware analysis report

Static analysis result for SHA-256 65072e938819ab73…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 02:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd86c96d98ac241e9851d7192d729bd SHA-1: 8289cc39ebe4a59f6bdc646f7aa9e23a49b4f200 SHA-256: 65072e938819ab7310a58f9f599667b4135dd7ecf95dcef31224a042bc7a33a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains references to business plans and URLs that suggest a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=meat+goat+farming+business+plan+pdf
    • http://sinowe.braveheartfencing.com/uploads/1/3/2/7/132712207/5404864.pdf
    • http://files.rccgwinnersassemblygp.org/uploads/1/3/2/8/132814306/5959120.pdf
    • http://files.gladstonealliance.com/uploads/1/3/2/6/132681670/gamemedafijen.pdf
    • http://files.madamedrydensgrade5class.com/uploads/1/3/1/4/131407088/lutagotoru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/94124500117.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/84724708602.pdf
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/7147028832.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4277/files/34031965805.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/pomegutulobofikuwufev.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/manual_mitre_saw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/verb_1_2_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26225030347.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/logubumafuxaredil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/19449127656.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006133.bin
bf27c68191e4ee0f4d543540dc0141bb363e8cb569b86deb1df66cf4e11c5735
pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 5508 bytes
font_01_sfnt_off000073e0.bin
0abd529f8014fbeef73d26e2a0ef213c9eaa8fe71ec378121126b7228e62a55b
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E0 10240 bytes