Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed07f9722b2a146…

MALICIOUS

PDF

69.3 KB Created: 2020-11-25 22:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf9c62c6b4d8b942f16d5694d517d69 SHA-1: 4c5469fc1c865046c08b91ce02784d9d2af489f6 SHA-256: 4ed07f9722b2a14630f7f6accc1b23c5906921cdf878ded98799d706773c5b65
234 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://gettraff.ru/aws?utm_term=lenoir+county+nc+arrest+reports', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference 'Lenoir county nc arrest reports', suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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
  • 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://gettraff.ru/aws?utm_term=lenoir+county+nc+arrest+reports
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f974b2a9da47.pdf
    • https://cdn-cms.f-static.net/uploads/4462688/normal_5fb85d80b9131.pdf
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/biwonoxenopaj-sekepuxezup.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fb7bbb5216ca.pdf
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8782b198da5.pdf
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5fb4ac27c3597.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/469c4335-8c69-4e43-82c4-3b5315040251/91074012456.pdf
    • https://uploads.strikinglycdn.com/files/949711e8-3e72-429c-9edb-a3b005273951/xoruxutowed.pdf
    • https://uploads.strikinglycdn.com/files/b0e4d423-788f-4641-b2b2-baffdd0bafdc/pitex.pdf
    • https://uploads.strikinglycdn.com/files/225d2508-bdfe-43e8-95b5-4779f15e2f14/zosogofof.pdf
    • https://s3.amazonaws.com/lebaxa/68833215646.pdf
    • https://uploads.strikinglycdn.com/files/f6db35ce-42a2-471d-a64a-3b7dc2b357d1/fnaf_4_crying_child.pdf
    • https://uploads.strikinglycdn.com/files/1b720f27-fac5-44b2-8d33-442f5ca2843f/organigrama_del_departamento_de_ama_de_llaves.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_off0000c612.bin
5430542f183175ba77415f8975d0a9880e0e17bad2f9b9b3b25391f2b3fb2945
pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 4820 bytes
font_01_sfnt_off0000d687.bin
befef5a8da8893ab9a9ae7b5a85d67fdae5994e1ae17dc44cb5f7c2adc631910
pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 10644 bytes
font_02_sfnt_off0000fabd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 4324 bytes