Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd40dbfd6219adb8…

MALICIOUS

PDF

43.9 KB Created: 2020-07-30 08:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 09132c1f38155b1568fa522b701ad8ee SHA-1: fd873e2fcbd9bf7195dbb3135811bc42e425dadf SHA-256: fd40dbfd6219adb8fcf9b56e1d0663d86b82891549e39026484b10573ce72426
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.ru'. This URL is disguised with keywords related to song chords, a common lure for SEO-based link farms. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through seemingly innocuous content to malicious sites.

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=adonai+hillsong+chords+pdf In PDF document text
    • http://files.rockandrosh.com/uploads/1/3/2/6/132681690/9f76f9161194.pdfIn PDF document text
    • http://files.godsairforce.com/uploads/1/3/1/3/131398099/5585583.pdfIn PDF document text
    • http://files.ministryofunderwear.co.uk/uploads/1/3/0/8/130874477/4e6a74fc6d2.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/1/0431/5794/6530/files/58746022506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/60457854104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/95037512601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1590/5185/files/83398815263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/banunapuviderezukusixozon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/86292815952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/robevigenuxugugezovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/futexidodinivuxafexej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/zefutakixizisimu.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 6

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_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 4996 bytes
SHA-256: aae98c69036e1a25518dd5a072f2ecca02af20fdb5b3174545f58a240c5c78d5
font_01_sfnt_off00007559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7559 14616 bytes
SHA-256: 16eacdd0a3a0c512b5f230691eca6fb21329cfe528e42f57abf5966927295253

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