Malicious PDF — malware analysis report

Static analysis result for SHA-256 c825d6e9e848a0a5…

MALICIOUS

PDF

41.3 KB Created: 2020-09-16 05:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 026a50f403ca2c536040fb01f97c20d7 SHA-1: 1f099e216b848f3241116314bc97ab1ae01a6d2e SHA-256: c825d6e9e848a0a5e82da62d33889785dd1acfee3dea77c75c09ef934c323703
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=50th+birthday+decorations+for+her'. The document body, though partially corrupted, contains text related to birthday decorations, likely a lure. No scripts were extracted from this sample.

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=50th+birthday+decorations+for+her In PDF document text
    • http://bewili.angelicaarvylas.com/uploads/1/3/1/4/131409090/fodiremokuto.pdfIn PDF document text
    • http://files.strategy3inspired.com/uploads/1/3/1/4/131483592/4081412.pdfIn PDF document text
    • http://files.letteringchallenges.com/uploads/1/3/1/4/131437987/jirurumu.pdfIn PDF document text
    • http://lumat.martinebailey.com/uploads/1/3/1/4/131408899/4320244.pdfIn PDF document text
    • http://fesubigan.majujayamachinery.com/uploads/1/3/1/3/131380001/nirej.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/1/0434/1743/6327/files/pimesadan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/accident_reports_today_ocala_fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1524/7771/files/aprendizaje_basado_en_problemas_en_medicina.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/868b90_ff08be8569be4093801b5a8ae0b7f0c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_af261f6360c346d684d920b93d5a5342.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5be868_ba2f3f0491ab4554b15eb59bfec6a6bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bba345_d99ab8a5364f47ad90af86b420ba436a.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 5

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_off0000638a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638A 5492 bytes
SHA-256: 7adbbef153283beab4ef652d2435dc6b3035927cc666abe70b82112e0769b8b1
font_01_sfnt_off00007631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 10008 bytes
SHA-256: 2ea8aaeba6788b6bb70df2c27f838ee61a92f8a293b81480b9b2280ff1fe93a2

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