Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5d3d87345ee21c…

MALICIOUS

PDF

35.5 KB Created: 2020-08-20 09:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 470197d24c64a2a3d4eea55099342032 SHA-1: 2a1aaadbaba6f49dabdf8ad8cd034765a7ea1a05 SHA-256: 7d5d3d87345ee21cd9d4c06c30b3fa8e1b2237b1bc2da40dcf1f1a78207ab266
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of a link farm. The primary redirector URL, https://ttraff.com/pify?keyword=art+of+problem+solving+pdf, is flagged as malicious and indicative of a phishing or scam lure. 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.com/pify?keyword=art+of+problem+solving+pdf In PDF document text
    • http://files.arteristrutturare.com/uploads/1/3/0/9/130969705/kifatodojibuvuji.pdfIn PDF document text
    • http://punesejo.torilaynepermanentcosmetics.net/uploads/1/3/2/7/132712354/78eb935142cd2.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/1/0437/7663/9127/files/chuuka_ichiban_sub_indo_batch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/vukafuraxufawodaguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/73913067840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/85881664479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/50342397420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/jetefemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/jepefigugalawuboba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/xanamitefigid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/37548403050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/33352584609.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 2

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_off00004e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E34 5340 bytes
SHA-256: f2961e9e6d63aec38cdd9678f437da900b0cc5831ab5e76996644286bacf6b79
font_01_sfnt_off0000604a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604A 9756 bytes
SHA-256: ce08c7dcefed215234cf229f268524e324549bb6134b0bc5781c5ff850a7c387

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