Malicious PDF — malware analysis report

Static analysis result for SHA-256 4758d21cb9089e4f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 10:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e78b25ac30419d4e67449a36649e59c SHA-1: 80c1ce312e7c44a5f5c5d5afc24f900205be25f6 SHA-256: 4758d21cb9089e4fc59513f41d10768e0d569f69ce0c95aea0ab289204bed577
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify-hosted PDF files, suggesting a link farm or SEO manipulation tactic. One of these links redirects to a known malicious URL (ttraff.cc), indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=bothering+synonym+formal In PDF document text
    • http://files.cprfun.com/uploads/1/3/2/6/132695365/b569714.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/1/0431/0797/5335/files/the_astronomy_book_big_ideas_simply_explained_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/risajitamagukilol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2329/2840/files/closer_bethel_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/siwesajanowunuxax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/22727762340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/62575242724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/25753367093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/standard_kitchen_cabinet_sizes_in_mm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/push_to_new_github_repo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/battelle_developmental_inventory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/gakopurenowadeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/mazazelakufaputevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9965/0216/files/fugevakevatobaluze.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 1

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_off00006cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 5332 bytes
SHA-256: 90631393ba894543e8630e7c2ef27b52f138c1837ec8e00087226132dca1288a
font_01_sfnt_off00007ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC0 9576 bytes
SHA-256: 58e62d4418b9b8f2db986ac8c3baffbbb4abccf9af4830e05c9714fe958bc9e0

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