Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8172cb5861ee6f9…

MALICIOUS

PDF

33.0 KB Created: 2020-09-01 09:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a08fbfe056e62acf01a23a0b8ed1066 SHA-1: 82560c1acd8525aea7982da9a366945afe8027c0 SHA-256: d8172cb5861ee6f9ce7700884cd41b516530f0e2c357c71620b033ec7644a57e
120 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 a redirector URL. The primary redirector URL, 'https://ttraff.com/wix?keyword=adjectives+describing+character+worksheet', is flagged as malicious. While many other links point to benign Shopify domains, the presence of the malicious redirector indicates a malicious intent to lure users to harmful content, likely for phishing or malware distribution.

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.com/wix?keyword=adjectives+describing+character+worksheet
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/the_norton_introduction_to_literature_shorter_12th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/quadratic_equation_worksheet_grade_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/84261015252.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/zekomaxup.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/apc_netshelter_visio_stencil.pdf
    • https://cdn.shopify.com/s/files/1/0446/3860/1379/files/mofawafazewekon.pdf
    • https://cdn.shopify.com/s/files/1/0470/5904/2472/files/because_of_mr_terupt_guided_reading_level.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/rokaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/minecraft_mmorpg_server_with_classes_and_quests.pdf
    • https://static.usrfiles.com/ugd/c12414_4a21116e5dff4d45a80d8f29665467e4.pdf
    • https://static.usrfiles.com/ugd/a91264_ab3c7f8b3bbc4a619a8ff79447db616e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f83f012773864f15b88dd7246eeb3c87.pdf
    • https://static.usrfiles.com/ugd/f46427_f5abb86759f5406a9850c17003dd212e.pdf
    • https://static.usrfiles.com/ugd/cf14a4_0a6b63ef8e0a460898dbdcb37b769e54.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_off000044b0.bin
1887a88f89bd9568889636f10414763e3960c2217042de19d7129cf8989cc541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44B0 5592 bytes
font_01_sfnt_off000057c4.bin
62c568119a450dddcca176f937b6c634d0ba5d1aada31c16d1f248052cf559b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C4 9156 bytes

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