Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd58b14d0cbd123…

MALICIOUS

PDF

90.1 KB Created: 2020-11-11 02:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 355e9441af19370d15479f9ad1d05786 SHA-1: eecc6020d011f87657f34b74f91f699fb13f447f SHA-256: 8fd58b14d0cbd1231f577ded60b1a9216ce58cebca4c1c74737851743b999466
254 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 'gettraff.ru'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, one of which is a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://gettraff.ru/aws?keyword=red+car+game+unblocked
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f871a75a3cdd.pdf
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f8bcfdd84c90.pdf
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/fefubulaguwobezitasi.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/xufawuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/668258e4-ae80-4695-b3a2-9f0d0e45134a/sets_class_11_notes.pdf
    • https://uploads.strikinglycdn.com/files/2a94ba33-cd67-4ef6-93ea-c5351ccf1409/93687908684.pdf
    • https://uploads.strikinglycdn.com/files/fbb5472d-ff8b-4d8d-990c-589a4a5078bd/38304541905.pdf
    • https://s3.amazonaws.com/degagaziv/visd_jobs_in_victoria_tx.pdf
    • https://uploads.strikinglycdn.com/files/879ffa8c-b996-4ad4-a14d-1ed61ecaeb5c/.pdf
    • https://s3.amazonaws.com/votawawo/matlab_for_engineers_4th.pdf
    • https://uploads.strikinglycdn.com/files/02f8de31-30ff-4691-9cc0-94b682cfd3d5/miseberovobonag.pdf
    • https://uploads.strikinglycdn.com/files/c757d73d-415f-4e0b-b89f-234c3101c662/dedoxuxulowakerovolabejes.pdf
    • https://uploads.strikinglycdn.com/files/9906c048-0bc3-420a-a751-bdc5cda2587a/zotejojezuvuzalugakafe.pdf
    • https://uploads.strikinglycdn.com/files/a5cdd570-c95a-4544-8b34-b8029b66566d/piazzolla_histoire_du_tango.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_off0001232a.bin
86f6cfdc9a1b638f3ef4bef1e90d748fb37cad97c8c9529655a6beadf4be0602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 5292 bytes
font_01_sfnt_off00013515.bin
fedf0df0a85c570aeeced789b70a063d750c956d6112021187885e10ee2c004a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13515 11240 bytes

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