Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eafafd0f2eb1cb…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 03:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eeb525beb5585e03629b65edf699628 SHA-1: 9fd50ff2f0ab613a50faed5485f7bb7a01e8c53f SHA-256: 89eafafd0f2eb1cbf3590a2d0dc2c7507d7bac04d15c5246940652839fba7bab
152 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One of these URLs, 'https://ttraff.com/wix?keyword=les+conjonctions+de+subordination+ex', is flagged as a known malicious redirector. The presence of many external links suggests an attempt to lure users to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=les+conjonctions+de+subordination+ex
    • https://static.usrfiles.com/ugd/b8c837_7ee1033df6094cc2b48cb393bab4a6eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_61462ffe63534f3cb1f39665c46fd009.pdf
    • https://static.usrfiles.com/ugd/b8c837_8432177643f44956bbf81b136dba065b.pdf
    • https://cdn.shopify.com/s/files/1/0449/3488/9627/files/full_bass_guitar_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/tomug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/gepolevepepolidivumopogij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/43413473786.pdf
    • https://static.usrfiles.com/ugd/b8c837_c959401c0ceb4e5ebe8ae4b67ebb1093.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bccd6a9c70c48b3ae72f07ad2df43aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_3747a899bcf04340a272ee1d411db89a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7056f474405147048f057f18428ca38b.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeb2c51e61864088a723f52a2f679481.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c43ab42b40f4f7a892d247be19dfa8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_74942d65a4a642b8b780e8b884f61fd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a3ecd10e2ae41c4a38f2cb00ddd1fec.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_off00007765.bin
99f20a0c8834286ee34215e4d1e67deb5ccf571dae4bd9380ec161397fd44989
pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 5128 bytes
font_01_sfnt_off000088e1.bin
7b513ffbc4cd077255832f356ff73eed0de7ec5c85f6b80cf227952ad320a3c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x88E1 12368 bytes