Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9c8b56cc2f6170…

MALICIOUS

PDF

52.6 KB Created: 2020-09-05 20:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 694559fae7d6d8c36c636cc10dfa482d SHA-1: 14a42ab123ebf500059760985e97578bd2466eb8 SHA-256: 0e9c8b56cc2f6170068cc5c148da2f703771a2e13540d0fb4240f96d39f8d49d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.me/wix?keyword=hopkins+belize+fishing+guides
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bbe3e27c4de042d8b924d2f59be0f480.pdf
    • https://static.usrfiles.com/ugd/5b9365_b67ab20bd2914ffdb5407dd85c2be2a1.pdf
    • https://static.usrfiles.com/ugd/64e449_7b6bb3d6cf504b68b40760a80114aabd.pdf
    • https://static.usrfiles.com/ugd/111c46_771ad3825e744ea2af1ac873e012495e.pdf
    • https://static.usrfiles.com/ugd/ca300b_90d37fae8e7248ff8f292ed94124eb0d.pdf
    • https://static.usrfiles.com/ugd/52b593_428b581a476a4bf78a3dcb7daefd5c02.pdf
    • https://static.usrfiles.com/ugd/4dd980_4707ccade3ea4937a0b38e38b5640bac.pdf
    • https://static.usrfiles.com/ugd/01bc73_26ba98c24ef2427989cbb7c3e6b3a41c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/torodemotobofovabufami.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/destruction_warlock_pvp_guide_8.0.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/harry_belafonte_net_worth.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008588.bin
73c94a7354ac9d850e58ee68ff592610e2afb3b5de3684c3451f997986c9ab7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8588 5212 bytes
font_01_sfnt_off0000973f.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 1800 bytes
font_02_sfnt_off00009fcd.bin
f44e47ef0f8246e16bb2b73f7424f4473f0b944afb78c650323b5d41c38338f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCD 11140 bytes