Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2487f524900466…

MALICIOUS

PDF

73.1 KB Created: 2020-12-30 03:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 518ae62fab79467b204bf63948580ef5 SHA-1: 688addcfbab597a5cecef0ba518a53473a939809 SHA-256: 3c2487f5249004661f7f9c712356125efca8b5430e5c117e089e5fec014386fc
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://gettraff.ru/strik?utm_term=bitmoji+icon+ios', is flagged as a malicious redirector. The presence of a callback phishing lure heuristic suggests an attempt to engage the user directly. While no scripts were extracted, the overall structure and heuristics point to a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=bitmoji+icon+ios In PDF document text
    • https://cdn.sqhk.co/wefekoferu/K2Sjjjy/redskins_new_name_odds.pdfIn PDF document text
    • https://musuvawe.weebly.com/uploads/1/3/4/5/134528527/liwikozo.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/kojol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/simple_inequalities_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f3efe2-7cc4-490f-acb4-1a0f45d4eff1/tewijus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ebd09d-6c89-4b85-8a2f-3b503203ba41/72448119816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2d787a-ab94-4c02-ae2c-29ed1c154877/stellar_wanderer_ships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70bd1d5b-6dc2-4be3-810f-316c755f631b/zorejepumiresobenijoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9c5f5d-4283-4722-83df-032e24bcacb4/black_rifle_coffee_san_antonio_office.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9691b6-49ff-40aa-b7c9-fb1424e1592e/t_mobile_ac_1900.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/kundli_2012_software_with_crack_free.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_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 4732 bytes
SHA-256: ba4798e8513a440651234748e280bd41e13477a37978fcf08b03eb8d9be00b96
font_01_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 11696 bytes
SHA-256: cefb9e6071ef725b489c5050c58b72c70cca9aa81b58abe90944bf36048a17a1

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