Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9a930323f400b3…

MALICIOUS

PDF

33.2 KB Created: 2020-08-18 21:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 351d7bd64d78ad36f61a2afb52683bd7 SHA-1: 70ed48f5d84b21552d6e38b31d215f985b7889fa SHA-256: 8a9a930323f400b36224cc4376a618bdce1a3681393cd06ced0dbb251c95653a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains commonly used for SEO link farms. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=horse+drawn+carriage+crossword+answer'. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily obfuscated, but the presence of the malicious redirector URL and the link farm structure strongly suggest a phishing or malware distribution attempt.

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=horse+drawn+carriage+crossword+answer In PDF document text
    • http://files.alexasnyderstudio.com/uploads/1/3/0/9/130969356/9843479.pdfIn PDF document text
    • http://jijoxada.familylavisse.com/uploads/1/3/0/7/130776131/ebcd0a081359ca.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/1/0429/5802/8959/files/pijoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/97842142390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/bible_book_of_genesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/assembly_language_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/fifa_2020_awards_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/tigudoragegavezusub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/goloxelazitupaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/jumexegiderut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/dixevudagiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7985/0391/files/72145568391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/xalekodawejezajof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/82129691012.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 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_off000043db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43DB 5128 bytes
SHA-256: caa8befe69e2a97fad5dd547434c5b0dff1f4d380270b433628c0be29558a6b4
font_01_sfnt_off00005569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5569 10108 bytes
SHA-256: 4a9db1594da38ae235a6573457a03ee538ecaffc6a7854f7346adc9f1c446042

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