Malicious PDF — malware analysis report

Static analysis result for SHA-256 35bd16ba885ae483…

MALICIOUS

PDF

42.1 KB Created: 2020-11-03 13:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1809887da8c2f2b8d81b7421ec6f7dcb SHA-1: df50a8b7b3cf33421c414dca11fb3eb82c85a075 SHA-256: 35bd16ba885ae4833396e452b4c51f3b52e4948ab9912468f87069d0d405dc47
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though obfuscated, contains text related to setting up an iTunes account, suggesting a lure. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious infrastructure, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://cctraff.ru/aws?keyword=set+up+free+itunes+account+for+iphone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_5fa06c4f5c5c9.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/51489.pdfIn PDF document text
    • https://gazufasuro.weebly.com/uploads/1/3/4/4/134482956/4000134.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/vegonikumak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5f995f986c91b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5f9b8f920671e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5f9d09234fc21.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/1902700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c19bec-b3c2-4042-ad65-7bcce2dabb4b/40717175206.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/68444216196.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/zojum.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/5e_svirfneblin_magic.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/seoul_metro_map_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fasotajedag/87915648574.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_off0000650c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 5172 bytes
SHA-256: 37b249cb57984e810a7a598907d65013b650c9508e97c32224a817b2df3c542c
font_01_sfnt_off0000769d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769D 10776 bytes
SHA-256: a44532049c12c499a474e0b272c78b3412f8b98387ba9e6fa7f13dd2e1e80118

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