Malicious PDF — malware analysis report

Static analysis result for SHA-256 330c393280e86445…

MALICIOUS

PDF

39.1 KB Created: 2020-08-05 17:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa5d2fa4c16b34faf629d25d444e50ef SHA-1: a6975522affce065c58bdfc7c6234ba0762138c5 SHA-256: 330c393280e86445ccec13d73ce6e415e07b2a308dfb51bfdf3aa7ac586e337d
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=anteater+s+guide+to+writing+and+rhetoric+6th+edition+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. These factors indicate a social engineering attempt to redirect users to malicious infrastructure.

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=anteater+s+guide+to+writing+and+rhetoric+6th+edition+pdf In PDF document text
    • http://files.teachingsofisis.com/uploads/1/3/0/7/130775734/6470989.pdfIn PDF document text
    • http://files.nahyc.com/uploads/1/3/0/8/130814238/wowozof.pdfIn PDF document text
    • http://files.sparker82.com/uploads/1/3/1/4/131483343/2803877.pdfIn PDF document text
    • http://files.gruenetroutfitters.com/uploads/1/3/0/8/130813837/95e670afbf.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/1/0429/2627/6774/files/voltaire_l_affaire_calas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/kurewabixupimunukineguviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/nivorebuvuxajazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/rexufexinisuwevumelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2870/7488/files/called_me_higher_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/wurirokipubivijunor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/makanaginosutokeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/animal_kingdom_disney_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/disable_windows_game_bar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/jevufidox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/51252272143.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_off000058da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58DA 5620 bytes
SHA-256: 07041373471035f39ea320414f164924818286a4197e303ed48410f05739c526
font_01_sfnt_off00006c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0C 10192 bytes
SHA-256: e25cb3bd042159ff97b0f76f44c4f75e536953e6a3c4c3554d93be684702a97d

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