Malicious PDF — malware analysis report

Static analysis result for SHA-256 305c1abac0ce1d93…

MALICIOUS

PDF

38.8 KB Created: 2020-08-02 22:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2ad42c6f3925a071f71d89bde4e38ce SHA-1: 7b689d73d7419394a5dfba3401df5655ab90e8bf SHA-256: 305c1abac0ce1d931d1a943116d566d11a33ed08af1ff0541e817ccd5f01c5dc
202 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is associated with a lure for 'skidrow watch dogs 2', suggesting a phishing or scam attempt. The document also contains a link farm heuristic, indicating a large number of external links, many hosted on Shopify. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, and the document body was heavily obfuscated, but the primary malicious activity appears to be redirecting users to malicious infrastructure via embedded links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=skidrow+watch+dogs+2 In PDF document text
    • http://files.professorcole.com/uploads/1/3/1/8/131857580/bixokumafikil.pdfIn PDF document text
    • http://files.royalreadsandreviews.com/uploads/1/3/2/6/132695258/5761173.pdfIn PDF document text
    • http://files.petesenoffphotographics.com/uploads/1/3/0/7/130776110/2843535.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/1/0430/6337/8081/files/vumijat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/zajiribiveruxixut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/44178301138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/fisuvonus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/giwuxinususig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/kixizuvozajaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/88499660140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/83753001979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/memebili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/e5_92_b8_e9_b1_bc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/36658994160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.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_off000058a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A2 5560 bytes
SHA-256: 1e5d7a374325c18fbf6f55b18d5f386e8ae3ab8741ddc5f8e80cf7300719add3
font_01_sfnt_off00006b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9E 10284 bytes
SHA-256: 329c925eb793f766041ef3067ce7329bd09e0e6b0ec6f6399c20b111f00911f0

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