Malicious PDF — malware analysis report

Static analysis result for SHA-256 931c7875a1886dd9…

MALICIOUS

PDF

39.8 KB Created: 2020-08-20 05:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0834610098f111c9d75067514515686 SHA-1: 364fb241108e4a17072950c6d04923c7cd928993 SHA-256: 931c7875a1886dd98ec70d56a7da43931eac588b7cd374e159c9fb8ee70b69d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a deceptive title and numerous embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru), suggesting the primary goal is to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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.
  • 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.
  • 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://ttraff.ru/pify?keyword=jll+hotel+market+report+2019 In PDF document text
    • http://files.seedsforchangeconsulting.com/uploads/1/3/0/7/130776204/439aeb4ce356.pdfIn PDF document text
    • http://foxefavon.lampstandlearningcenter.com/uploads/1/3/1/4/131438356/wamizusekuwosoxe.pdfIn PDF document text
    • http://files.mariaburtonart.com/uploads/1/3/1/6/131606133/rololisugaxefe.pdfIn PDF document text
    • http://files.stillcreekequestrian.org/uploads/1/3/1/3/131381414/1757778.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/37955231143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9070/5573/files/animal_crossing_animal_island_gba_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/probability_measures_on_metric_spaces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/90551599561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/94783882237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/buzoderakejotijuroluguku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/somekalufejibubaxiwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/xuzolomixumisarifimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/36827870543.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 5

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_off00005d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2D 5416 bytes
SHA-256: 46a8cca9b70ac88265a0804bbfedbe39d38a13c3aabccd620236a100e959c44d
font_01_sfnt_off00006f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 10304 bytes
SHA-256: bf141d8a518bf1d66d409070b3fa1abe37b14b1eaa7d2f96a7bc21f3065d79ee

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