Malicious PDF — malware analysis report

Static analysis result for SHA-256 a545646434ac6e46…

MALICIOUS

PDF

37.6 KB Created: 2020-08-21 09:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801b60ea3c92448f343c59f4ed9c97a5 SHA-1: 567fc008fa7069ce307c6555f88bdcdc5acfc2c5 SHA-256: a545646434ac6e46508ae9178bb1f62c440f61e29628361982d26ea8e4f5defc
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'download button' lure further supports a social engineering attack. The primary malicious URL identified is https://ttraff.ru/pify?keyword=insoluble+solid+lab+report.

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.ru/pify?keyword=insoluble+solid+lab+report
    • http://files.chicagoyouththeatrefest.org/uploads/1/3/1/6/131606101/zapiliseve.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/pojonijogez.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/behavioral_activation_worksheet_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/54805281490.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/azo_dye_synthesis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/23552748897.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/8838908380.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/letter_format_po_box.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/55038874699.pdf
    • https://cdn.shopify.com/s/files/1/0450/0160/5278/files/labewodowavesomifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/77891213199.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_off0000562a.bin
4510025de936404e405b8875868dd7017985c64b12076e4903cf4f085e34ee91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x562A 5028 bytes
font_01_sfnt_off0000673c.bin
e5670a8ffde73b011246422a3baee0d878c2303a00137262b2468ef4b67eb12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673C 10264 bytes

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