Malicious PDF — malware analysis report

Static analysis result for SHA-256 b640e9f773e6dd46…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 21:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b03a4d179619e361929de210e1a10bdb SHA-1: 965fe6f2a7b3f7e729c2045c2284bd6d851b32f2 SHA-256: b640e9f773e6dd46425d40c5f9a22a2466feaccc9b4f454c5143e35a134990bd
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. One critical heuristic identified a link to a known malicious redirector at `ttraff.ru`, which is likely the primary malicious payload delivery mechanism. The document body and embedded links suggest a lure related to study guides, aiming to trick users into clicking through to malicious sites.

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=asvab+arithmetic+reasoning+study+guide+pdf In PDF document text
    • http://files.agoodsoakbathandbody.com/uploads/1/3/1/1/131163960/fipudewezes-gawegadukuga-zosopinenikomu.pdfIn PDF document text
    • http://files.revfrankmcfadden.com/uploads/1/3/0/7/130738792/6004182.pdfIn PDF document text
    • http://files.darnisart.com/uploads/1/3/1/8/131856815/gakusudaxuwapomevufu.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://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/zajisimutevanajaloxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2758/5445/files/tinkers_construct_writable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/raferabolinodulezomud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/statistics_for_business_economics_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/add_bookmarks_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/dufesalepalarupimij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/renipafutixanolefara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/49578294664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/gafuvinidalasapu.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4B 5712 bytes
SHA-256: 07ba07ca06a998c0a45bac961999718d33112cb1b9c7f3c41bd17dca360736e9
font_01_sfnt_off0000718f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718F 9992 bytes
SHA-256: 9e01dedd706235a8021babc7e447fa99b375e2e809fe95e1290498b887e9d9ba
font_02_sfnt_off000093be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93BE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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