Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16dd4aca31d3ef0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 02:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b9205f220b0264d645e0ad735cf3158 SHA-1: 5cc3925e53c5cacfa196ecce1796989bfd438c30 SHA-256: f16dd4aca31d3ef0f715c2861bab8b387096b422c4d073e5f099938ac9eed440
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file exhibits characteristics of an SEO link farm, embedding a large number of external links, many of which point to Shopify domains hosting other PDFs. One prominent link directs to a known malicious redirector. The document body contains garbled text and references to 'asciidoctor pdf image to embed not found or not readable', suggesting a lure or obfuscation tactic. The primary malicious link is ttraff.ru, which is flagged as a redirector.

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=asciidoctor+pdf+image+to+embed+not+found+or+not+readable In PDF document text
    • http://files.clsportswear.com/uploads/1/3/0/7/130738991/49e61f4077.pdfIn PDF document text
    • http://files.wildflowersistersboutique.com/uploads/1/3/0/8/130814297/subonibujuj.pdfIn PDF document text
    • http://files.mtzionmbc1.org/uploads/1/3/0/7/130776176/9ac2d.pdfIn PDF document text
    • http://files.pragueguidebooks.com/uploads/1/3/2/6/132681632/4e65907699c.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/1/0438/0770/3201/files/torutekizosawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/53095078683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/gumuritekiwabiresofira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/nufubawimafurozasifoterax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/zuwejol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/15057803422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/pijadafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/escala_akin_insuficiencia_renal_aguda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1687/0298/files/chudy_tata_bohaty_tata_kniha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2948/files/biwow.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_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 5604 bytes
SHA-256: a8c92e66db8b4d6e1bb176de1b08cae900df79a4aab9a08adbfc6476cd516910
font_01_sfnt_off000073d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 13504 bytes
SHA-256: 848c4aedbdb1831cc72d56159450844817faba2c474245bf655c143321cbf185

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