Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80943948e466186…

MALICIOUS

PDF

45.5 KB Created: 2020-08-13 01:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6d691622b30be9644a09431e459fa34 SHA-1: 3be98ba6421e576ffcac8d1c86449c6bf1402d93 SHA-256: c80943948e466186c7152fb9e3377109a1e18a758490a11c4e9ebeecdbcfb083
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Cakewalk by bandlab manual pdf' and the malicious URL, indicating a lure to trick users into clicking the malicious link. The presence of a visual download button further supports a social engineering pretext.

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=cakewalk+by+bandlab+manual+pdf
    • http://files.whittsendranch.com/uploads/1/3/0/8/130874474/4702736.pdf
    • http://files.atfbenefitrun.org/uploads/1/3/1/4/131452883/mogujip_bazefa.pdf
    • http://files.dumaynedesign.co.uk/uploads/1/3/1/3/131384335/wawewolonizima_xasololo.pdf
    • http://files.tannerpittmanlaw.com/uploads/1/3/1/4/131454692/14907018501.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/93242815803.pdf
    • https://cdn.shopify.com/s/files/1/0454/4128/6294/files/tepabudanuwosanirolupopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0844/files/65461239024.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/15103269138.pdf
    • https://cdn.shopify.com/s/files/1/0440/3780/0086/files/nexuxigukosuzaxamowok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/miscreated_dedicated_server.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/ksde_report_card.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/financial_accounting_standards_board.pdf
    • https://cdn.shopify.com/s/files/1/0434/7383/0048/files/gipajofaxoxupalona.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/esl_teacher_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/asfixia_mecanica_por_ahorcamiento.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/9852980055.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006680.bin
06eb7abdb2e778a24ae56a1981a93a7094db758074b3020ae10c56246fe85374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 4980 bytes
font_01_sfnt_off00007770.bin
840a61132428f15ca209e68b5f4dd967797a26d9378725061c9de426956d5079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 10424 bytes
font_02_sfnt_off00009af8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF8 4324 bytes

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