Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabe3f2e16dbad6a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-29 12:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eecaf63530525e0b63f9f07fbc7a2c35 SHA-1: 25554fefa71b7d61ec2dee99f277cc14de2424ee SHA-256: cabe3f2e16dbad6a5ccb86ea24c5e05ab4ab51a2ca3972c6160cbfc23acba263
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a movie download, which redirects to malicious infrastructure. The ML classifier strongly supports maliciousness. The document body and embedded links indicate a lure to a redirector, likely for further malicious activity. The presence of numerous Shopify-hosted PDF files suggests a link farm for SEO poisoning or traffic generation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=kl+gangster+full+movie+online+free
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/yamaha_rx_496_rds_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/kekokipetowuwif.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/kutogumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/52944038476.pdf
    • https://cdn.shopify.com/s/files/1/0430/8674/1655/files/types_of_centrifugal_casting.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/bilevojigesifomativa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/mageweave_bandage_trainer_vanilla.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2a1da7199a44c059a1aa85f7bc1cda8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e779b13cfdce488bb4cb7acf164f97d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aae4917859e4932aac2d8b100caaea6.pdf
    • https://static.usrfiles.com/ugd/b8c837_151d0201c8e44307b452a5ebf81ff981.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_off00005e8b.bin
3e5feb0829b742ea465c5ea20328778c08d82fb55ba931219d683d47b154d4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8B 5116 bytes
font_01_sfnt_off00006fef.bin
60db0189f254892b77295b27fd363f660f72a9d6d182f453e759a32d453be348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 10516 bytes

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