Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a4041c5e9ce51a…

MALICIOUS

PDF

55.3 KB Created: 2020-07-30 08:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 500b9d94bc8d13e9803df53c65ab7608 SHA-1: caaa24c92d957869de9da75b4fa203a1634b259a SHA-256: 71a4041c5e9ce51a3c425dc3792e54b360302017902dbdf25f2747ba2d91e4e0
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are part of a link farm designed to redirect users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically identifies a link to 'ttraff.com' as a known malicious redirector. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'equoterapia pdf' and the wkhtmltopdf application, suggesting a lure.

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=o+que+%25C3%25A9+equoterapia+pdf In PDF document text
    • http://files.raverstoriesproject.com/uploads/1/3/0/7/130775590/f00b362c.pdfIn PDF document text
    • http://files.canalsigling.com/uploads/1/3/1/3/131383018/8717392.pdfIn PDF document text
    • http://files.rocmrrc.com/uploads/1/3/1/0/131070207/4574f733b2442.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/1/0435/5653/6475/files/kawitak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3702/2615/files/xixenabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/sovajuwiviloliwekupawono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/90325811480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/woresojepupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/31639695097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/falimuredokujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/kijemukevoniwamevizinoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/zetodoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.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_off0000980a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980A 4896 bytes
SHA-256: 434a669ee48c09b3268648cddaf5ee4d2258600a8634c2f191d992589c6d46ab
font_01_sfnt_off0000a886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA886 12656 bytes
SHA-256: f28b14c1c0c9279b4aa0f77ffde35bb90936ddb82e938322a426c758d5d2b42e

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