Malicious PDF — malware analysis report

Static analysis result for SHA-256 2825a5899278d7df…

MALICIOUS

PDF

100.3 KB Created: 2020-08-05 03:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98095e1a753f263e03e539e8ac530051 SHA-1: ed5c8f7309ef71a03d17713e5a6f1e07cfd3f2e0 SHA-256: 2825a5899278d7df5eff143b3b63f3d746d39599f266c2fd505deb5f14f9d762
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL is https://ttraff.ru/pify?keyword=paleolithic+tools+pdf, which is designed to redirect users. The document body, though heavily obfuscated, contains keywords related to paleolithic tools, likely as a lure. No scripts were extracted, but the PDF structure and link farm strongly indicate a phishing or redirection attempt.

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.ru/pify?keyword=paleolithic+tools+pdf
    • http://files.innovativetherapysolutions.net/uploads/1/3/1/8/131871912/3613517.pdf
    • http://files.multiplatformmastermind.com/uploads/1/3/0/7/130776205/musemutoro-wojakunorame.pdf
    • http://files.diedhardlaughing.com/uploads/1/3/1/1/131164095/a92048b60dded68.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/mamutoresupedogomeret.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/vewalegeruwixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/xawomuwakukega.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/sowujo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/vekapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/67902910539.pdf
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/92300866179.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/mowozutonulip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/1683790979.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/bam_bino_allergic_to_cuffin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/stewart_multivariable_calculus.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_off00014842.bin
b9bc0b3e67bb90b962107d1e1fe7e45b0b10e6a7c41d1861402223d19901ff47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14842 5148 bytes
font_01_sfnt_off000159cb.bin
202c3a3f004abc5857347c7b26061b8462efba683d8debbc75cfc0e98b6fff66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159CB 12680 bytes

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