Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd3734c3014a8f5…

MALICIOUS

PDF

74.6 KB Created: 2021-01-04 01:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a924b9b24180a7695da73cff4d6d1838 SHA-1: e2c07031ce8f24c3fed9bab983db7d1e140a0e8a SHA-256: 9fd3734c3014a8f5469f0ac7cc8473e9c95734529ea3a19fc1717bee5fa9a0c6
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ggtraff.ru/aws?utm_term=anoka+county+child+support+modification+forms`. The document also contains a mass external PDF link farm, with one example being `https://uploads.strikinglycdn.com/files/1e20f4da-94ce-46fe-b5f2-e9fccaf788d8/wedomudifofepaxekav.pdf`. The presence of a callback lure heuristic suggests a phishing or tech-support scam pretext. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/aws?utm_term=anoka+county+child+support+modification+forms In PDF document text
    • https://ridivuxizoram.weebly.com/uploads/1/3/4/6/134633738/5895477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fa53005f40b2.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/jitugix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5fd8b8fd3f67e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f8de84427967.pdfIn PDF document text
    • https://lomedalepa.weebly.com/uploads/1/3/4/4/134438906/2719246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_5fad9b2fd0b42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417214/normal_5fe08d2d30a26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1e20f4da-94ce-46fe-b5f2-e9fccaf788d8/wedomudifofepaxekav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5147926-5eef-499b-aedb-f6c661392782/favosorofitegof.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/poragesaninep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68191cd-8571-488a-83df-9bb8181a1236/tikab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7966ec8-0149-417f-a25f-6e3cdacc40ba/rujigejegelefajusosolodak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c838eefd-a097-4903-9f49-5b45e23618ad/69913556726.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD785 5316 bytes
SHA-256: 0875d8239bda66b5781296eae496668ca664386f15d356a1adfc4b0c47631e27
font_01_sfnt_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 11440 bytes
SHA-256: 8f4c9dae5419fd4feee0d1dea619ae317cf764a4a5019e7956fec45c90f21c52
font_02_sfnt_off00010f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F75 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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