Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f462981d85429e…

MALICIOUS

PDF

60.0 KB Created: 2020-08-21 21:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d904b024ff571e7101e1d074fa3c140 SHA-1: be681ed6b30bf5d1f55465601669b1d7e7c29dac SHA-256: a2f462981d85429e0dfed9fe4ded1e263e8f889ef02610cd7dcae85d339830a7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=yoga+for+fat+loss+pdf`. This link is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious URL is the most critical IOC.

Heuristics 3

  • 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.
  • 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=yoga+for+fat+loss+pdf
    • http://wusibati.qcfamilymartialarts.com/uploads/1/3/1/4/131411150/fumoforu-jamexewufezajuk-jufib.pdf
    • http://bajavup.vycareer.org/uploads/1/3/2/6/132680903/xawajogamodufog.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/rusoxefowegovukosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4629/files/toxarawawunax.pdf
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/convert_eu_to_rf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/81485933251.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/85521024204.pdf
    • https://cdn.shopify.com/s/files/1/0438/2054/8253/files/raxewikifikobax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/fumaduzox.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/life_cycle_of_balantidium_coli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/letter_format_for_ownership_change.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_off0000af0e.bin
40163ea4478c7a6b1fb17f7c522547ba95de1ef43fc399de58813b3eba39b052		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0E 5172 bytes
font_01_sfnt_off0000c0b8.bin
8ff952e3ff6094eb8feecac2f355bfd043fa4e7262b8af168a1e8401318a4758		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B8 10244 bytes

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