Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a061d94570b1e9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 00:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73fe339648358cf2f9727885ec60667c SHA-1: 8f6323ae89fe6a991ffc6687dd519ac4fc454c34 SHA-256: f4a061d94570b1e983530d5fe9657e89e8169b44613de4feb303638f6f3fd2a9
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a download for an owner's manual. The document also features a link farm of other PDFs, likely for SEO manipulation to increase visibility. The presence of a visual download button further supports the lure tactic.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=audi+a4+b7+owners+manual+free+downlo
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/antigona_sofokles_kniha.pdf
    • https://cdn.shopify.com/s/files/1/0443/5696/0412/files/national_geographic_channel_videos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://static.usrfiles.com/ugd/e73fea_e3cdf2524cf24a6b827bba9cb25b52f0.pdf
    • https://static.usrfiles.com/ugd/c7a620_a6f72810c92743eba2636ebf73b5b9cd.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/kibilowolaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/basic_thermodynamics_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/vejufom.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/ffmpeg_60fps_instagram_codec.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640b.bin
e39504f96b9d8a562dcf0d7179377e9f348b18a9c6bd57c65d7b5ee3673a78fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5440 bytes
font_01_sfnt_off00007685.bin
110ec8e1c2e800a9848170814deee3bba6efeaf451b9c2ec760ddee28d08b575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7685 13828 bytes

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