Malicious PDF — malware analysis report

Static analysis result for SHA-256 3599ea9e9f8f60a7…

MALICIOUS

PDF

55.7 KB Created: 2020-08-31 09:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86989a25e41c7ffcd0c3eec9b115deb SHA-1: 1fa04c2ae9312a4d1478d3f64ff9f3f65e84112b SHA-256: 3599ea9e9f8f60a79eb15cba90cff9ded19baf447b5b3e96cac7ce8e390b3361
154 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, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, many pointing to 'static.usrfiles.com', suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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=pathfinder+kingmaker+companion+quest+guide
    • https://static.usrfiles.com/ugd/b8c837_ea71c40b953e43ccac0318b398318834.pdf
    • https://static.usrfiles.com/ugd/f523c3_f1dc4db95cc8489c82b64c10b60b5163.pdf
    • https://static.usrfiles.com/ugd/d1d005_b80d0ed0700c44db92eb6eede9b2e396.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/45056838993.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f15a7589ab442185a06ff5ac978955.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed5ff982e8504dd98857a5e5da02b28d.pdf
    • https://static.usrfiles.com/ugd/b914b5_39f129650fe142ee833e61d23e4aed5d.pdf
    • https://static.usrfiles.com/ugd/374ce0_372e5c1f8d9841c9bd66a0951081bc82.pdf
    • https://static.usrfiles.com/ugd/1f5cef_0a145dd40661457ebfaaee4b90a652cd.pdf
    • https://static.usrfiles.com/ugd/f55bec_968facf75c3f4adf8f8032db7b2eb8ca.pdf
    • https://static.usrfiles.com/ugd/7d21c0_2a179642ceae4a008692e9eca0008fad.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_off00009ada.bin
c3b60a3237ac5c78c2aa5413aa230974fe46d0d8cb7df103e81270bf77cb7637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADA 5728 bytes
font_01_sfnt_off0000ae24.bin
06c51a878211f842088c7ba7b2026001f19162d7570817c68b7e4139658e4469		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE24 10588 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.