Malicious PDF — malware analysis report

Static analysis result for SHA-256 9602b7e037ea73fe…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 12:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caf533a9e3863fc43f878b46e770c4b6 SHA-1: a9ffbbd9d53b902ebc50bb4e2a1e042ca925d9b2 SHA-256: 9602b7e037ea73fec91799c3bb4429e50cff8655eee3112f1d7cf7db3a4739a0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=dead+frontier+2+character+build+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0430/2195/9325/files/xoguxamovuvizapefe.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure users to malicious content.

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=dead+frontier+2+character+build+guide
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/xoguxamovuvizapefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9076/files/42991433444.pdf
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/83990514912.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cc9a21817e24df2867177d881349732.pdf
    • https://static.usrfiles.com/ugd/accd1f_c77413ce4b574c31955e4b4e2c0cbc45.pdf
    • https://static.usrfiles.com/ugd/b8c837_4efc041662804cd8850484ddba4488ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c30b724d95e481bb88dec8bf69ee96b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f5ae58e2d734e10b331da350aea6af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_10b615679b27417daca252752d28507f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6071401020040e89cf7e0f04e877af2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d3364034134d359eb31f41ffd4f906.pdf
    • https://static.usrfiles.com/ugd/b8c837_00b3d5b5938c44d1b04ac96dc5199399.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_off000068fa.bin
19bf22d4bbf0564e07eea72a84b536ccf80752573d4b7120fd41a34830888444
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 5376 bytes
font_01_sfnt_off00007b41.bin
17ba28f7e07c6885e857f4ae0db5fa49814373b0e66918471cac5c575ab598a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B41 10420 bytes