Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a86ded576c4a3e…

MALICIOUS

PDF

47.9 KB Created: 2020-11-07 11:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26dc9519670af5c115b4d5251cb78433 SHA-1: 7ee1ea6c51cb3e70177853522c378715c9d5cd1d SHA-256: 60a86ded576c4a3e5d0c42593beace795f2c1021e3d7fa3aa3b510b7ed3a86c4
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, https://trafffe.ru/123?keyword=range+guide+p2p, is embedded within the document body and is likely the intended destination for users tricked by the lure. The ML classifier strongly indicates maliciousness, and the PDF structure with numerous external links aligns with common malicious PDF distribution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?keyword=range+guide+p2p PDF link annotation
    • https://mirurilusenut.weebly.com/uploads/1/3/4/6/134631679/puron-buwuzoze-loxam.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/acfee87.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://s3.amazonaws.com/vapite/megutalejotimurojarorewo.pdfIn PDF document text
    • https://zonujivuvek.files.wordpress.com/2020/11/34659736677.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/lesson_of_the_kaibab_answers.pdfIn PDF document text
    • https://napedez.files.wordpress.com/2020/11/jazafomaxuxodada.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://lomajunon.files.wordpress.com/2020/11/woxupotetigimovixopife.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bilingualism_theory.pdfIn PDF document text
    • https://pazesuv.files.wordpress.com/2020/11/54784547422.pdfIn PDF document text
    • https://vojasajufuda.files.wordpress.com/2020/11/the_importance_of_being_earnest_discussion_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 4652 bytes
SHA-256: 7a128a7b58593c3021a0a276a9ec05999b4647b546ecc9f30641b66ddadeebad
font_01_sfnt_off0000815f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 10472 bytes
SHA-256: 76aee9a387001aa647d6180fbe0a73159a3b43933732e0e42314de1bc40b1b6d
font_02_sfnt_off0000a4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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