Malicious PDF — malware analysis report

Static analysis result for SHA-256 a315b641f9268074…

MALICIOUS

PDF

36.4 KB Created: 2020-08-19 17:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9db29d937e0bd4295281dd7d2d8ab4d5 SHA-1: b701c7fd41df602549d60f553e75e2ca44bf30bb SHA-256: a315b641f92680742ca55debe07f3ad3f571229100d0c4425bbd2be6eb797676
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to traff.cc, which is flagged as malicious. The document body and heuristics indicate a lure for a 'free e-guide' to entice users to click the link. The PDF also contains a large number of links to external PDFs, suggesting a link farm for SEO manipulation or to distribute further malicious content.

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/pify?keyword=free+eguide+guitar+music+theory+pdf
    • http://files.stgeorgebadges.com/uploads/1/3/0/8/130814070/jakilamaron_bogirezo_voragunodenu_divasojojaw.pdf
    • http://files.onequickchange.com/uploads/1/3/1/4/131407102/1129197.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/exponent_practice_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/panalulojasufomoxupadeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/91243413804.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/14529295927.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/battle_run_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/30865297285.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/dgms_medical_fitness_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/bonipetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5766/files/61984925057.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_off00004f5f.bin
10862d3ed69867be99e8cd23ec713e1bcbb9e66b5374363a7349c9b4af8aeff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5F 5592 bytes
font_01_sfnt_off0000624f.bin
80f60c27c0e9a4e4cc2f4492fec65dac87e9862bccbdf3109a89174e8572a3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 10112 bytes

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