Malicious PDF — malware analysis report

Static analysis result for SHA-256 df006398e56c4f44…

MALICIOUS

PDF

57.6 KB Created: 2020-08-12 02:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76a79f50eca019812a08b521c5b3aa0b SHA-1: e76681c5e559ea2851ed5c91bd9aaa30ca2be6d4 SHA-256: df006398e56c4f449bdfeee5a23196910dbc5005fd586bd4ea77c9ec77ff7855
120 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one prominent link identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site disguised as a free textbook download. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious destination.

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.ru/pify?keyword=american+english+file+3+second+edition+teacher+s+book+pdf+free
    • http://files.thekentuckynational.com/uploads/1/3/0/7/130776126/4844393.pdf
    • http://files.avtarindiatours.com/uploads/1/3/1/1/131163898/9868576.pdf
    • http://masus.danielleaugustine.com/uploads/1/3/2/6/132681670/7169326.pdf
    • http://files.fourlittlecarpenters.com/uploads/1/3/1/4/131408056/lumivuvana-nezigamisupifus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/53854369665.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/70545482913.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/73291386359.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/xusepumumonawo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/vatedew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/71011137278.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/49206198537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0431/6220/6357/files/aramaic_interlinear_new_testament.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_off0000a10b.bin
fd5f6d2dab1fcfaad229e5f54750a6c3dc301008715084e8da5ae2f287eeb2f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA10B 5928 bytes
font_01_sfnt_off0000b4f8.bin
c7cfbc144ed80ae6de6d6964765a2763a2a591d5acefd9d64ae928b206c000b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F8 10576 bytes

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