Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7f1d770288a186…

MALICIOUS

PDF

73.6 KB Created: 2020-08-17 18:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 937886714b5f6944192f500f755d8f32 SHA-1: ac0af18286fc4562afa8e3de91316221ae0b29bc SHA-256: ff7f1d770288a18604aabf53903b0efc5aa67c2a383da54d4db1c111ee9f06f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The embedded URL in the document text also points to the same malicious redirector. These elements indicate a campaign to lure users 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.ru/pify?keyword=cannibal+holocaust+300mb In PDF document text
    • http://files.judithhand.net/uploads/1/3/1/4/131437378/9e50b84f3d9.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/1/0432/4691/1643/files/kenmore_elite_refrigerator_model_795_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/tilegejawoxikuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/cakephp_2_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/angaraka_runa_vimochana_stotram_in_telugu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/55206522781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jumofukamex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/xebet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/random_numbers_r.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 5296 bytes
SHA-256: 4aca25c435c529f05162784fca0160902dc548cca602d50e9d64bf499f26fa9b
font_01_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 11004 bytes
SHA-256: c338acd92a9380d02a4d0d6a8e2b8e20d7bf42b7d7d0351098ff2826e95f7364