Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d7a27570378eef…

MALICIOUS

PDF

45.5 KB Created: 2020-07-30 12:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc9ea291dcb0d45a23b47f74ee3a8696 SHA-1: e7ce2f927dda89d3abc8a3ad4069924f707510a6 SHA-256: f5d7a27570378eef590017bca8448e38d4cb3544734b52a2f580cb3eb4264e9a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, forming a link farm hosted on Shopify. One of these URLs, ttraff.ru, is identified as a known malicious redirector. This suggests a phishing or malicious redirection attempt, likely to lure users to malicious content or exploit kits. The ML classifier also 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=general+prologue+to+the+canterbury+tales+study+questions+answers+pdf In PDF document text
    • http://files.capiovo.com/uploads/1/3/1/6/131637606/4328609.pdfIn PDF document text
    • http://files.nicholascornell.com/uploads/1/3/1/0/131070152/fb8c1.pdfIn PDF document text
    • http://files.lynnegobioff.com/uploads/1/3/0/7/130738988/3759835.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/1/0434/0878/5562/files/woraganuwibopari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/66962367478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/12323698350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/17924455966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/16412759492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/fubitulogebovokodowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/kawafesikejaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/telewedajebinibotenej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/guturabezizixulosenisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/77936672391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/sosatilumumipizajakoje.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_off000072df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 5788 bytes
SHA-256: fade73c4e3a0722888f4a33f86561d4f67ac45663e29543ea433ede40813e58c
font_01_sfnt_off00008693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8693 9956 bytes
SHA-256: c96559124f2d1ed9b01e610e61a873d51b855b106d9782f7e3e5b53ef181d611

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