Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bc03e269e2f359…

MALICIOUS

PDF

55.9 KB Created: 2020-08-21 16:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2788055f42d08431616df882a60c62f SHA-1: 59749372ccceea801b90b69cedd0e9dd7086dc71 SHA-256: d4bc03e269e2f3597b15b313923ba665abb3c476c0437fda9f9e0927c1bc281b
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URL 'https://ttraff.com/pify?keyword=couch+to+10k+training+guide' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to a 'Couch to 10k training guide', likely a lure to entice users to click the malicious link.

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=couch+to+10k+training+guide In PDF document text
    • http://files.sgionet.com/uploads/1/3/0/8/130874413/zujojunejiguwimurob.pdfIn PDF document text
    • http://files.noahkinsey.com/uploads/1/3/0/7/130775434/nalifude.pdfIn PDF document text
    • http://files.sterlingsoccer.org/uploads/1/3/1/4/131455680/nupaz-kojajoni-redumor.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/1/0431/7026/7300/files/motekonanoxave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/jivilutudiwunurudokak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/86416298541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/42539305224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/35254018578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/88483835348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/gonipijinejorijofe.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_off00009e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2D 5156 bytes
SHA-256: d0e9cf0643a701648ff609ea8dacbdcb5be707a014a4b8cd2ef7ca5a760a2687
font_01_sfnt_off0000afab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAB 10336 bytes
SHA-256: fea1977895c14a83661d993b830ce123756259e0ee42ab2099dcaff4fb7db5db

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