Malicious PDF — malware analysis report

Static analysis result for SHA-256 88eeb3a2767dafe1…

MALICIOUS

PDF

44.4 KB Created: 2020-11-07 07:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 64c1f90689b2f5483133e75150bfb58f SHA-1: 158e8851a192f035a39ac7e616416c5c6f156893 SHA-256: 88eeb3a2767dafe1a5462dbf90b350f2e19d783968618c7613e6517368a9ea14
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many pointing to SEO redirectors, suggesting a link farm or phishing campaign. The primary URL, https://traffset.ru/aws?keyword=britax+marathon+70+g3+car+seat, is likely used to distribute malicious content or phish for credentials. The ML classifier strongly indicates maliciousness, and the presence of numerous links supports an attack pattern focused on driving traffic to malicious sites.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?keyword=britax+marathon+70+g3+car+seat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f880543719ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8c03497f05c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f9c17a0d9e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f9c5024440d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8a90073072a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407724/normal_5f9ec4ec467ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fovodifikade.files.wordpress.com/2020/11/henrys_law_constant_for_co2_in_water_at_25_degrees_c.pdfIn PDF document text
    • https://jazefev.files.wordpress.com/2020/11/98505235657.pdfIn PDF document text
    • https://kenimadobe.files.wordpress.com/2020/11/soposimagitojasafuwewogej.pdfIn PDF document text
    • https://fidapuno.files.wordpress.com/2020/11/ninumivu.pdfIn PDF document text
    • https://tidobumuwi.files.wordpress.com/2020/11/non_action_verbs_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f71a0ef-ade8-406d-b653-f227cb6cd9e5/eu4_aggressive_expansion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb483af-cafd-4d9f-bdc7-e07b1f369896/d_d_monster_manual_online_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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5E 5684 bytes
SHA-256: f1b49cd50a027e04eb8352c3b1f70dccec29ac80c74827be8d2a58767f80b9de
font_01_sfnt_off0000819a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819A 10364 bytes
SHA-256: 1b6f9656b66aaa3443c3832636b976e3a8015e966345f01c883de326ca95fa11

Open this report in the interactive analyzer, or submit your own file for analysis.