Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5561418b652ebd3…

MALICIOUS

PDF

36.5 KB Created: 2020-08-16 11:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26ad2522176f570cb9e1097ed91e4cc0 SHA-1: 6f1966b781fb97f15cc6a8195c26e0f0b6661717 SHA-256: b5561418b652ebd3bf6316984dd66999819fc67de51d1bd4f52a6212fef3e2e5
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one prominent URL pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and numerous benign-looking Shopify URLs, likely part of the SEO spam tactic to improve search engine ranking for the malicious link. No scripts were extracted from this sample.

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=basketball+uniform+jersey+psd+template In PDF document text
    • http://files.primitivedreams.ca/uploads/1/3/1/4/131483361/gukemuxunakun.pdfIn PDF document text
    • http://files.learnfrombarrymaterials.com/uploads/1/3/1/4/131406498/xutofowewisiwo-luwowawa.pdfIn PDF document text
    • http://files.activatetransformperform.com/uploads/1/3/0/9/130969655/9906056.pdfIn PDF document text
    • http://files.yakimatietonirrigation.com/uploads/1/3/2/7/132741476/bipediwiwolusupun.pdfIn PDF document text
    • http://files.andrewjohnsart.com/uploads/1/3/1/0/131070112/048a769b1c9e3.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/1/0430/8919/9268/files/karaoke_cd_g_creator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/55638886915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/luzilesemot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/tupegesuzepanaxojabiforax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/7952/0676/files/early_transcendentals_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/pajukadevukurarese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/ext_glicol_calendula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4983/4901/files/analysis_of_financial_statements_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/91148069310.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_off00004ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA9 5620 bytes
SHA-256: bdb1aa911580f10fd043bd44b885739a28352985119c8acf97ed6f5839906c88
font_01_sfnt_off000061b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 10336 bytes
SHA-256: 7dbe9dbe43df17fee1dca026c3c689f6d1d667c02854278c31dba57b1b276c09

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