Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7a569a81c2b4c6…

MALICIOUS

PDF

46.9 KB Created: 2020-08-22 02:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d7da431ab938cb91f974aafede1d059 SHA-1: 7db564c8a080dbc80df281f60f2cd58dfb3f523e SHA-256: 5f7a569a81c2b4c6382931c4f4347c7a923221457a3490d0028f51c053f7bae8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Cuddl duds flannel sheets full size' and embeds multiple links. One of these links, https://ttraff.com/pify?keyword=cuddl+duds+flannel+sheets+full+size, is identified as a malicious redirector. The document also features a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the presence of malicious redirector links and a high ML classifier score indicate a high likelihood of malicious intent.

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=cuddl+duds+flannel+sheets+full+size In PDF document text
    • http://files.curranscorner.com/uploads/1/3/2/6/132682281/1635026.pdfIn PDF document text
    • http://files.maindeleternel.org/uploads/1/3/1/6/131636655/wifeson.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/1/0435/3500/7893/files/54420748884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2927/2488/files/anand_film_full_hd_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/kimujema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/87826252696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3041/3475/files/lubekubegulodobapixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/kolalan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/depelinagusazoboreturizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/wuwev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/m._ed_psychology_books_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/certified_internal_auditor_books.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 4856 bytes
SHA-256: b6ba0393ebcc51b9d224ff13edb43be2cb5b4dd1db36d8035d5700b2d716dfe8
font_01_sfnt_off00008ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD9 10592 bytes
SHA-256: c3582bc65b789efb888aaf29d84c6e860d0a536fc8452c0b06545d23c1a94162

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