Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace0816a1add98be…

MALICIOUS

PDF

36.7 KB Created: 2020-11-07 13:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 42023d1fbb3a66fa811c4c239ef218d7 SHA-1: 90ba54fd8368fa87010084cb253cff9dd7cf2a7d SHA-256: ace0816a1add98be1cf1fe635a1823236900031e1f85cc3714bf5270f50227d7
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many of which are embedded within the document body and presented as part of a "manual" lure. The primary malicious URL identified is https://traffnew.ru/123?keyword=toro+51599+manual, which is likely used for phishing or to redirect to further malicious content. The ML classifier strongly indicated maliciousness, and the structure suggests a link farm or SEO abuse for distribution.

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://traffnew.ru/123?keyword=toro+51599+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5fa4262cf06d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_5f970f0916d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f88ebb31740b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fa484505a339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f975010c85a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f8bc57f2bacd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_5fa2212432266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f87e88c3eaf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5fa64276ef95f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5f96197c8a341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8a2b98e260f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_5fa5d28081c1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pubofuniwox.files.wordpress.com/2020/11/luwozavuvur.pdfIn PDF document text
    • https://tuwizusom.files.wordpress.com/2020/11/39819592540.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 1

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_off00005327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5327 4932 bytes
SHA-256: a0a55f560a3aec82bd222ed6d44a99bbe31d53e062df8abb1530509f99a3754e
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 10240 bytes
SHA-256: 402dc901685206322236428ee44546e9c257bfc7371b430f4fbbc1889d7b9abe

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