Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cf4b8214ecd0dc…

MALICIOUS

PDF

40.3 KB Created: 2020-08-16 21:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f98f0977cdbf5f64ebff8b200f23eb72 SHA-1: dde95e3d737566d2e4766c5cd93419caac499297 SHA-256: 74cf4b8214ecd0dcfe25fc2332bd6056b7a1f8be1e82ebf432055ec2cf541b1a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded document body and URLs point to a lure for a 'Casio fx 95ms manual' which redirects through 'ttraff.cc' to potentially malicious content. The ML classifier strongly supports the malicious verdict.

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=casio+fx+95ms+manual In PDF document text
    • http://files.nokomispl.org/uploads/1/3/1/3/131381602/f9808f0f7cfc28.pdfIn PDF document text
    • http://files.mustardfitness.com/uploads/1/3/1/4/131413718/sujezaraj-vimuzuzawub-begukiwojuxu.pdfIn PDF document text
    • http://files.themassageplaceop.com/uploads/1/3/2/7/132710779/vawujem-zimagewa.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/1/0438/8595/3192/files/35318057651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/gogadepotoruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/56351426124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/11527013835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/autodesk_viewer_for_mac_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/10156650787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/86806736435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/52930242020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/93415293576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/lorofopukawekebifenefijan.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_off00005fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 5068 bytes
SHA-256: 5dc2930f9e8d3dabc58f223499175cbacef1228d1a7b0fef1b2b5ee2764c87db
font_01_sfnt_off00007122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 10464 bytes
SHA-256: db68c3b225e5134994e7475b533ff0b71f435773d80c5e2f4f4c1c72664bf07e

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