Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd4d4909ba66905…

MALICIOUS

PDF

49.1 KB Created: 2020-08-02 16:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf4d58f39135968aed39d8a98db54ef0 SHA-1: b72b3d92dcfb955a2c1bb34122e0a23a7d301c3c SHA-256: 5cd4d4909ba66905436b671ccf35e8f895a44036778bdcf68f24fe169b9343ae
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm designed to attract clicks. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs and link farm structure strongly suggest a phishing or malware distribution attempt.

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=php+latest+image+in+dir In PDF document text
    • http://files.sarahreed.ca/uploads/1/3/2/6/132681452/5192245.pdfIn PDF document text
    • http://files.angellight.lt/uploads/1/3/1/4/131438150/sojedanupu.pdfIn PDF document text
    • http://files.teachingkidstothrive.com/uploads/1/3/2/6/132682076/bobasat-mogefivevupo-nezeboga.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/1/0431/6980/8550/files/72169683988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/3119416214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/87243733968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/53275237950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/55479114982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/notazalavazewidopojejimis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2816/9383/files/deathguard_equipment_cache.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/71833422794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/lilolimowigekaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/ketomemefuliwanolimuze.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 8

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_off0000746b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 5372 bytes
SHA-256: fea335ee9dc5acc33fe3b535a9fd2c572443f19ad24a2e1df04dc78c738fc0ed
font_01_sfnt_off00008684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 15620 bytes
SHA-256: beec3e5d4e7bc37a5cb66bd2ffa81e2b6532d00ab94621223434a6b145d0b380

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