Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b0fe34912ff12a…

MALICIOUS

PDF

200.3 KB Created: 2020-09-18 20:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 225af9cbdc0e38fe665e4ca6c1d308b5 SHA-1: 9d894f25849aa90052e53543e62883262df8a86d SHA-256: 69b0fe34912ff12a2fc52864e33db78a2ea6ef466131285ec156a0d3c5c0990d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector infrastructure. The embedded URL `https://ttraff.ru/wb?keyword=grim%20dawn%20partial%20components%20removed` is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt. No scripts were extracted, but the presence of a malicious URL is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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/wb?keyword=grim%20dawn%20partial%20components%20removed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://552f3e84-2fc4-400b-98e0-73fd31fb02e3.filesusr.com/ugd/b28ae2_6ebbc8a978b045cbbaaf0c3c6d61d265.pdf?index=true
    • https://552b5bc0-d766-48e0-aa06-e3821ea5ac66.filesusr.com/ugd/af0aa9_d2f23072226f4817ba59dd0d7481c300.pdf?index=true
    • https://04d084d6-ebba-4f0f-bdf4-94027fa3c838.filesusr.com/ugd/2486b5_035c7dc25a354442b5f1f073f6525321.pdf?index=true
    • https://4952bba5-14c5-472d-a4b2-4ede01da29b3.filesusr.com/ugd/89064d_0d06fc167141456f9192a85df493b544.pdf?index=true
    • https://10c27ca9-8e43-4d2e-9dc3-4bb8c35f637f.filesusr.com/ugd/89363e_b6d8cf91d128452b90d2810be19ffbee.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/dijobowoleb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/download_full_oxford_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/50539832055.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0211/files/interviewing_skills_training_for_managers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/skyrim_crash_fix.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/nalenovixevowisud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/basicity_of_aliphatic_amines.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/paluvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugifewelogukepebokiz.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_off0002d1cc.bin
b5d6c7f2dd887da2b82c0e2ed6b42f7046bee7e8fcb978edb67184d538ee523e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1CC 5404 bytes
font_01_sfnt_off0002e42a.bin
b4c06b1efc9b9182ba1f04316ba2059ec39d2aa510bd6ee67d96124fbe173190
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E42A 15304 bytes