Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd57a88ba6062252…

MALICIOUS

PDF

67.0 KB Created: 2020-12-07 10:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 74083402b74f38de2f7ff7a723430f2e SHA-1: 16ec375bf3bc53401084719732f52c6d6aaf4751 SHA-256: cd57a88ba60622526c8408efcefe1f753cab46b9d4bf332d78faffd5c1cb8bae
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL `https://traffmen.ru/strik?utm_term=matricom+g-pad+bx+manual` is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the PDF structure and heuristics strongly suggest a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=matricom+g-pad+bx+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424662/normal_5fba9b2c3f68c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5f9ffaabb5b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_5fc0d4dc7cb33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e555f7cf8c75402ae412/t/5fc8acafb0f45b2a3d2b2bb7/1606986928658/filotifukikakosizasowupu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a2040a2757459b03286b/t/5fc9641304e7723ed2f7e23c/1607033887783/donkey_kong_arcade_switch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19a8f40f1034a5caddecf/t/5fc9154c381c0b73fd18d3c2/1607013709024/53902753448.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d766a3bf4b14aba8e616/t/5fc3d834a97599144e6e0222/1606670388882/hey_your_cat_ears_are_showing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11b4016f6d44b07c000b4/t/5fc3cf525147b14804a753a7/1606668114480/chapter_15_the_urinary_system_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5f66c8-35fb-4e18-a45b-8949c7ebb4b3/velenumopatezi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00a5311f6a4198480ec6e/t/5fc1709dbc819f1cf40ecfb6/1606512798843/educational_research_quantitative_qualitative_and_mixed_approaches_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/acdsee_pro_5_license_key_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a3d03cb-86a2-431b-9aad-8b5e1fcdecd8/padikekit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2923b7848ba205d233c3f/t/5fc7d3b9e6f2ed3f50dc2288/1606931386186/motor_doping_tour_de_france.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC837 5460 bytes
SHA-256: 23ea13e9cddb1e13a357ed0258a3688a1b6d4b732affd773a66ba11484b026e3
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10796 bytes
SHA-256: db354a601bb1f73715ffa974f83b45d68e8196ce25ed3c8381e84566b009161d

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