Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc73fe75c556a95…

MALICIOUS

PDF

78.0 KB Created: 2020-11-24 00:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf48095ea340c00b1691e60aaa1686b SHA-1: eee25e2bf9b98ce6756330a4fb8cae00dab3be55 SHA-256: bdc73fe75c556a9503b35048e24595d4c2f52ed000d4222808b7e0ce429ed3c0
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123'. Additionally, a high-severity ML classifier flagged the PDF as malicious. The heuristic 'SE_URGENCY_LURE' suggests the document uses urgency to prompt user interaction with the malicious link, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/123?utm_term=camper+roof+repair+sealant
    • https://cdn-cms.f-static.net/uploads/4479222/normal_5fb2caba5ac47.pdf
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fa54eb1c4029.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8defdb91d62.pdf
    • https://cdn-cms.f-static.net/uploads/4472766/normal_5fa502d210e5a.pdf
    • https://cdn-cms.f-static.net/uploads/4495387/normal_5fb88a7753539.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/mozedijiz/fomozijunopuxanap.pdf
    • https://s3.amazonaws.com/sugowubuf/96299476762.pdf
    • https://s3.amazonaws.com/jebokizez/dazasebawabuzosokekumuna.pdf
    • https://uploads.strikinglycdn.com/files/7c1039a7-e252-4117-89ae-aec480b76a49/63891820473.pdf
    • https://s3.amazonaws.com/xenavuxa/74317316046.pdf
    • https://s3.amazonaws.com/sasufufa/rimezomak.pdf
    • https://uploads.strikinglycdn.com/files/41f906fd-3a18-465d-985a-03ab97e5c674/38608712810.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e920.bin
516ca80a51d6d193caafb57805f83f31f142f383e1fb9fb8ef48e0c70d36f39d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 4856 bytes
font_01_sfnt_off0000f984.bin
58eeee05a8561d587b45f3e60dd9e3fa4193420ee5793ea526de0d3a15bc0dae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 10588 bytes
font_02_sfnt_off00011d8c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8C 4324 bytes