Malicious PDF — malware analysis report

Static analysis result for SHA-256 64643ddac3064852…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 20:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bb894b7bf01aabef28c763ff15246f3 SHA-1: b74abf6014208678693ec89177599995ce1cc4a2 SHA-256: 64643ddac30648528054a1c76ff59c204b8491bbe4680f16c4ca86aa9a992b2e
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to create an SEO link farm, with a primary malicious redirector URL. The document body and embedded links suggest a lure for free downloads, ultimately directing users to the malicious site 'https://ttraff.ru/pify?keyword=caterpillar+butterfly+transformation'. The ML classifier strongly indicated maliciousness, supporting the heuristic findings of a malicious redirector and link farm.

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=caterpillar+butterfly+transformation In PDF document text
    • http://files.hbdixon.com/uploads/1/3/1/6/131606360/6083889.pdfIn PDF document text
    • http://files.efreewarrensburg.com/uploads/1/3/2/3/132303359/7463981.pdfIn PDF document text
    • http://files.i90land.com/uploads/1/3/0/9/130969278/01a81dacc2a93c.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/1/0429/8801/1673/files/21690946919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/convert_to_kindle_format_via_amazon_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0160/8353/files/all_cars_logo_with_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/catatonic_schizophrenia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8053/8529/files/74931847893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/goxudasemilegezafupuseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/pofufuxumikunavibes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/caverne_de_platon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3170/5238/files/bc_hunting_regs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/2495642336.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_off00005fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 5196 bytes
SHA-256: b8341ebd4b65fe3c5fa9f4f3b6f56f3d6899e16e02ba7fed01423aa16e76ce15
font_01_sfnt_off0000714d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714D 10308 bytes
SHA-256: 461026be5305e6374ecc71dd92e108829484186e0a5d847cbe2d45f1b8c0ef4c

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