Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59c351109448518…

MALICIOUS

PDF

38.9 KB Created: 2020-08-15 05:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb6ed983edae5dc7c2fdb079d2b30bd4 SHA-1: 114cc627f1a60b91a96e2a8c7b1c955e162c1d58 SHA-256: b59c351109448518721e5473f6da13103003162da1ffff04d59e00724e4ecfb3
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-hosted PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic firing confirms a link to known malicious redirector infrastructure at ttraff.ru. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector appears to be the distribution of malicious links within the document.

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=nominative+and+objective+case+pronouns+worksheet In PDF document text
    • http://files.petermanjewelry.com/uploads/1/3/1/4/131409597/1bbc9.pdfIn PDF document text
    • http://files.wedmorehh.com/uploads/1/3/1/8/131856173/wumanugepuxuxek.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/1/0431/4837/8280/files/jixunedinipejuxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0294/3899/files/zatigebiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/j4_jungle_s7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41267837863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3207/5678/files/60756496403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/nazasiwexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/79503922241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/canadian_solar_400w.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/blockchain_explication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/gifutasegoxosos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/nunexufewurumalanusiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/planilla_tarjeta_de_credito_banesco.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_off00005894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 5680 bytes
SHA-256: 951a43f6195c9efa0b824a3d2e7c47c7adfd13f6f271e2864660a7d19c047711
font_01_sfnt_off00006bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 10152 bytes
SHA-256: 71116d4d338a1394035e1d8495a9b73190c5683f7adeffbfb2980c470a00629b

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