Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff813ea3393c88a…

MALICIOUS

PDF

50.4 KB Created: 2020-08-20 02:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe23436911363496a27f81ae42c5d77a SHA-1: 7979640d8e354942f0e4a2bf9fa7ac1cada74e16 SHA-256: bff813ea3393c88a7e3f6542d0d41dffbde9e1da96024bc647d8d8817703276a
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=prezi+classic+templates'. This link is presented within the document body, disguised as a lure for 'Prezi classic templates'. The file also contains a large number of external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated, but the primary intent appears to be directing users to a malicious URL.

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=prezi+classic+templates In PDF document text
    • http://files.gaofficials.org/uploads/1/3/1/3/131378921/nuvorif.pdfIn PDF document text
    • http://biwujonaw.keribethjones.com/uploads/1/3/0/8/130874197/madopazomuba_motunikus_lonenagafume_kilat.pdfIn PDF document text
    • http://files.defy-foundation.org/uploads/1/3/0/7/130775462/fosafenedutito.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/1/0433/0687/7080/files/69865881622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0177/9100/files/video_editor_app_for_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/51457446904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/do_vpns_really_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/24232093790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/famivonupetiwobalubaxag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/pevasozamolebefoluxidomok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/sadilaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/graco_4ever_all_in_one_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/historia_natural_de_diabetes_mellitus_tipo_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/nigaxemitudifusasuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/juzuwapa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7250 5132 bytes
SHA-256: 415bfb6da6c02cd381028f5985f939a854fbd9de6f41f193fe598f160501279e
font_01_sfnt_off000083a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A9 10340 bytes
SHA-256: b3821fcd16730885d461e19489c49c8d43d61c4eaa75cc71eba18ed466f2ebe3
font_02_sfnt_off0000a738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA738 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67