Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cd397e804855f1…

MALICIOUS

PDF

43.0 KB Created: 2020-09-26 19:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 020d9509148d800b6adc3472c323ca56 SHA-1: 3862a5162dec7229b4b1687336b0befd5f437c73 SHA-256: e0cd397e804855f1f7c4fd2961a91f1ab316718904976a94c84971dc513268da
214 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link to `https://ttraff.ru/wb?keyword=fort%20knox%20recruiting%20school%20barracks`, suggesting a lure to malicious content. The presence of a callback phishing lure in the heuristics further supports a social engineering attack. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=fort%20knox%20recruiting%20school%20barracks In PDF document text
    • http://files.willowdaleequinecentre.com/uploads/1/3/1/4/131437313/mikok.pdfIn PDF document text
    • http://files.ericaannphotography10.com/uploads/1/3/1/6/131607712/6777856.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/1/0436/4160/2208/files/fifesezutesubufegufak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/top_bodybuilder_image.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9400/7968/files/74628612859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/22064433057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0574/1989/files/silent_letter_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/81750974084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/94972181354.pdfIn PDF document text
    • https://c17c6d4e-c6ed-4678-a635-9764767b3a5f.filesusr.com/ugd/5c7528_b2b4215e701f428a9ed9da52f1d72eba.pdf?index=trueIn PDF document text
    • https://958d2e4f-d6d5-4f61-b097-9e80a28e69f8.filesusr.com/ugd/5262df_615a1b4a807c49f2a84a8dd84b590777.pdf?index=trueIn 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 2

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_off000069c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5288 bytes
SHA-256: 24e98bb8cc5396f1fdcb39d7828cf62410002a83c5166095a79b4a17d9429d55
font_01_sfnt_off00007bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 10380 bytes
SHA-256: dee31968e33ec37a12fffb3734b75468ac12aa9676ed3d27d13174c5f017d9da

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