Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09a715c713b521c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 10:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f294c8f5b9c90c7b22b4bc6f860b3fe SHA-1: 6ccaedbf977eb999ecb769d3d1d5fcd202b0b962 SHA-256: d09a715c713b521ce92a1fca22590ed7e116b7f9120dd739be74e82f88457721
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=my+little+pony%253A+the+princess+promena'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to 'static.usrfiles.com'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and references to 'My little pony: the princess promena', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=my+little+pony%253A+the+princess+promena
    • https://static.usrfiles.com/ugd/c63dba_9b6ed78edc894cd7b8d17e1fcd6aa2b5.pdf
    • https://static.usrfiles.com/ugd/09273f_0a1ff60ec1df4353bec29b05311bbde8.pdf
    • https://static.usrfiles.com/ugd/eed56f_bc79a3d92d3e499d844a33a872dcd5d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_dac20c1629db4edea42acf905b7e44bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_645c089ac308464b8c1b746283966581.pdf
    • https://cdn.shopify.com/s/files/1/0437/5219/4202/files/levodesozuxulajizujasis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/baahubali_2_full_movie_tamilyogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/bedroom_design_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/87838223109.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/tazuf.pdf
    • https://static.usrfiles.com/ugd/e745be_1fbe667f26534da194063d2e3aaf6569.pdf
    • https://static.usrfiles.com/ugd/b8c837_013be2fdc21c4e9b97afb638a87075e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_242eacf27ca840ac8947c64a1df6c130.pdf
    • https://static.usrfiles.com/ugd/1d64af_24b959d1d8ec40f1b61bdfe82e091277.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_off000069e5.bin
acd000994242204baf231ec39d38efe491607c2580319d61e6a58f6d61b93162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 5332 bytes
font_01_sfnt_off00007be0.bin
849c65bab83323453969eff00e55233926dfd9b1dc4120c748c1ff6dccccccb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE0 10092 bytes

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