Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85a3c7723d3f35a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 03:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0d0319270617ddf0cf47439b05ec3ec SHA-1: 7ac2630afb368ccc9a3379a47f61110c8432ce69 SHA-256: c85a3c7723d3f35a67bdd4378be42d254654d2e966be74a449cadb76b7e2f262
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 pointing to Shopify domains hosting other PDFs, indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the structure and embedded links suggest a social engineering or SEO manipulation attack.

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.cc/pify?keyword=championship+manager+17+apk+ios In PDF document text
    • http://files.mishapink.com/uploads/1/3/1/4/131406749/1c8601.pdfIn PDF document text
    • http://tunabomi.conceptfrontier.com/uploads/1/3/2/8/132814930/6766961.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1807/0685/files/benajorudulakozexamoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/pusepevapogumiwatizaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/arduino_programing_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/jadurezenogegosawazedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/juvevixuxedavelodajop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/minecraft_playstation_3_edition_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/34069971827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/jawumuzanekanazelizuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/command_line_reference.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000558c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x558C 5128 bytes
SHA-256: 7bc50f570bf49ea86bdd111b8a54a4f856fdc995570dd8e7c050aee4e1dcdb1d
font_01_sfnt_off000066d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 10384 bytes
SHA-256: 7ece3fd95c001ae2a054d0fe9da7250d474fd41282f22e0f4e0fb8f6d9227477
font_02_sfnt_off00008a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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