Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f592292d4585d8…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 23:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25a65382afabc25b37276b036279b097 SHA-1: eb007c8a670388778731617c02b393f95f6e5947 SHA-256: d0f592292d4585d83efbf9e1adae422544ff4dc3691dfcf9aadfcc456a2708e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on 'static.usrfiles.com', indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. The ML classifier strongly supports the malicious nature of this PDF.

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=asset+performance+management+gartner+pdf
    • https://static.usrfiles.com/ugd/b8c837_a2e58e398be845f0a68eaf279256ff45.pdf
    • https://static.usrfiles.com/ugd/73f3b0_cfb354f14a6c4c2796285c31796a94cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_682d915c828e49ccae42f5eabca10abc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b92fa0b6174c46968c8cddc0ad240f12.pdf
    • https://static.usrfiles.com/ugd/808d8c_0654b673aabf472e83288af886e886d7.pdf
    • https://static.usrfiles.com/ugd/271e65_58e1103041a049b38f2d158e1f8bffdd.pdf
    • https://static.usrfiles.com/ugd/48f461_9cc7aa7c7c244f1f8ebfe84282233689.pdf
    • https://cdn.shopify.com/s/files/1/0441/0192/7064/files/dudepu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/pdf_analisi_logica_tabella_sui_complementi.pdf
    • https://static.usrfiles.com/ugd/ab059d_cc8de4c3aceb4c72a472e257fffce937.pdf
    • https://static.usrfiles.com/ugd/15cd4d_cbca6e9c58a54836a3adf9c6affdb89b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0045a5acf644ecd8e81c7dd61163492.pdf
    • https://static.usrfiles.com/ugd/735424_cac425eba0524e6eb99aa171a505d922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060f3.bin
c58063fcbc6643eaa9194a0d61a4b26896df74221975f3190498653bb560980b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 5172 bytes
font_01_sfnt_off00007264.bin
f86740eb9c1c14dbebbb9b10d531f64fc0e43451084cb879bfa59e19cd4f1975
pdf-font-stream PDF embedded font (sfnt) at offset 0x7264 9916 bytes
font_02_sfnt_off00009453.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9453 4324 bytes