Malicious PDF — malware analysis report

Static analysis result for SHA-256 7846b8d055ecbcc1…

MALICIOUS

PDF

39.1 KB Created: 2020-08-11 17:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fbe67d3e4c557d0c71b46dec2249f82e SHA-1: 485b7ddea0811501efd7259da6823accebcbc8c1 SHA-256: 7846b8d055ecbcc11cbcd9262dfdee989bb842e3ff5a2147355cd3874aaad367
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free downloadable content, likely a phishing tactic. The presence of a malicious redirector and the SEO link farm heuristic strongly suggest an attempt to drive traffic to malicious sites.

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.com/pify?keyword=personification+exercises+with+answers+pdf In PDF document text
    • http://files.drhafezi.net/uploads/1/3/1/4/131407164/totobo.pdfIn PDF document text
    • http://files.mccordchapman.com/uploads/1/3/0/7/130738889/3236573.pdfIn PDF document text
    • http://files.revdanielgregoire.com/uploads/1/3/1/3/131398145/dakodeb_vivaxezafeperoz.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/1/0434/8739/6004/files/boost_your_self_esteem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/pujobizunedubonas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/2589095819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/47626206055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/mugijox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/92629020203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/depoveruzaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/is_there_any_ps4_emulator_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/73655442438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/19107177399.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 8

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_off00005b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B18 5372 bytes
SHA-256: e559f8f51619d418eccc442451f869eec97b2aca086fcce0036ee36cfc3168c7
font_01_sfnt_off00006d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D64 10024 bytes
SHA-256: 851b129d92693cf82b6c03797d20d98a5159710207932a19c0f7c49ae84437ca

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