Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a61f3c0bce9e2e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-01 04:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44b564798f1aabcc89bcd47fb546dfa8 SHA-1: f21959d01a9ae884aa345d4252221c0ffa459c90 SHA-256: 25a61f3c0bce9e2e4e3e494633dde4998f8b2a419cc9b9c50f7a617670749dd9
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=adobe+flash+cs6+torrent'. This suggests the document is part of a phishing or scam campaign, using deceptive links to redirect users to potentially harmful sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=adobe+flash+cs6+torrent In PDF document text
    • http://files.omdoggies.com/uploads/1/3/1/4/131453735/bb84246d8.pdfIn PDF document text
    • http://files.heartbrake2breakthrough.com/uploads/1/3/0/7/130739892/967682.pdfIn PDF document text
    • http://files.stringsviolinlessons.com/uploads/1/3/0/8/130814586/xujupemajakirib-tamililodinejiz-jukuxavatozemaj-walidelu.pdfIn PDF document text
    • http://files.troyyouthassistance.org/uploads/1/3/0/7/130739839/lesidumagezereb.pdfIn PDF document text
    • http://files.newbernapp.com/uploads/1/3/0/7/130739190/9c7a4ba5871.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/1/0431/7567/4014/files/justin_guitar_music_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/dezumuviwapefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/gitivojebibaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/kewubadaxomav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/powowakiwojaxebize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/transporter_the_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/muwolijizutusaduvopeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/44500435283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/23280304943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/84416660842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/72918751391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/kagegede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/70281093218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/43449920661.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_off000066dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 5392 bytes
SHA-256: ac9f7d3db64383a7cf0d4ba506d4b08fb29a3f613c5c1edabe8475192fbebb76
font_01_sfnt_off0000792f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792F 11292 bytes
SHA-256: 6d8c788482d860b668e506f7105d36d369a067cfbff081b22ab0bbc537bfe74e