Malicious PDF — malware analysis report

Static analysis result for SHA-256 5641fd66a66a9bb0…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 06:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0182004aeeceb771543270d8089f00f8 SHA-1: 7a8df5d3e82f536b4a166ec58071c46d8f68c972 SHA-256: 5641fd66a66a9bb06a111cd65ce540a6c49becba0f03c6c28f635bd417736e54
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cbr1000rr+2008+service+manual'. The document body, though heavily obfuscated, contains text suggesting it is a service manual, which is likely a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=cbr1000rr+2008+service+manual In PDF document text
    • http://files.aforcapacity.org/uploads/1/3/1/8/131856700/mimuxuzopev.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/1/0435/1790/3008/files/74561073015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/80984065369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/53388971358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/aircraft_accident_investigation_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1940/3165/files/aston_martin_vantage_v12s_manual_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/57038671904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/dijubapovofad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/77887310452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/newojabagukepotekutofu.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_off00005d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D06 5568 bytes
SHA-256: 158cf9a0177803928f756c209459d69a9f728f260c61b1de9f76b8c399ade0fb
font_01_sfnt_off00006fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE4 14064 bytes
SHA-256: ddbb74db11cbb938630670bbdafae21684f4fadbe3679115bf577a43286035c3

Open this report in the interactive analyzer, or submit your own file for analysis.