Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad363dceeb2787c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 08:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc58f7c04f90288d3e6d407945572efd SHA-1: a81f15feccfacc019cda9d1c85d26a15dd7ef302 SHA-256: 3ad363dceeb2787c84302a79543b47123c9d059f46a24665104e89ca330df3f8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm abuse. One of the primary links directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=phonics+three+letter+words+pdf'. The document body, though heavily obfuscated, contains this same URL and references to PDF files, reinforcing the link farm attack pattern. 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=phonics+three+letter+words+pdf In PDF document text
    • http://files.cozineclimbers.com/uploads/1/3/1/4/131437225/zigida-kejarabeberepaf-dugola-tosevusutalirin.pdfIn PDF document text
    • http://files.mesquitegraphics.com/uploads/1/3/1/8/131856619/9723384.pdfIn PDF document text
    • http://files.convictionsolutions.com/uploads/1/3/1/8/131871674/rotovuzixaduwo.pdfIn PDF document text
    • http://noreva.mvkofcclubinc.org/uploads/1/3/0/7/130775432/21b76.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/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/41355072601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0528/6296/files/gexoxorokural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/57370053014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/83447943290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/gopajolimesaxobekopuzutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3758/5571/files/affidavit_of_motor_vehicle_gift_transfer_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/99936385824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4665/6408/files/channels_of_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/63836261472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/andhra_pradesh_census_2020_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/tobifasozep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/nemorogapegegilom.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 3

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_off000065a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A5 5124 bytes
SHA-256: ac64509dc0bcf27271ba64e391f0003ff794156cbb37a6e9c3e53246ca05a7fa
font_01_sfnt_off00007723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 10464 bytes
SHA-256: 701c3e180da57936dd0b010cc4a5525cbe2ae6465941c90c6073874bf00ea6fd

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