Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb6f1a5d3fa5a8d…

MALICIOUS

PDF

46.7 KB Created: 2020-08-29 15:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d247a6be4068b929d7638874c69154a7 SHA-1: 84af772e7291380e52b10ec76a76cb842558b865 SHA-256: 2bb6f1a5d3fa5a8d8be4739f7b28d1f6bfded14c1f91f5f1f38898f2b43bdb56
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a prominent link to `https://ttraff.cc/wix?keyword=saboteur+2+card+game+rules+pdf`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many pointing to benign Shopify or usrfiles.com domains, indicates a link farm SEO tactic to obscure the malicious redirector. 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=saboteur+2+card+game+rules+pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/92649176608.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/kepimipuxudeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/woxufotuzuri.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/geometry_word_problems_with_solution.pdf
    • https://static.usrfiles.com/ugd/9734e7_afc57578b61b47d9bea8510921b00b97.pdf
    • https://static.usrfiles.com/ugd/b8c837_56c69a133a9e4447b6721566e63020f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_368acbcc35ed4116b2c9c9ddc8986b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe114e92fed432bb41651a335f86c31.pdf
    • https://static.usrfiles.com/ugd/b8c837_356757b73cb642b19deb0bff8ac64bd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_72552df394024fecb2380f1220cda70e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0112be33c4024272b3e7e00e42b4f45b.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_off00006b22.bin
70cb95b51c6becf05662c96ff34a6d5cb830d9e75dfec96063888c2e763df135
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 5576 bytes
font_01_sfnt_off00007e13.bin
4a434d0c1c1286828e18a6396918c2ca2a4ec813347a5e0a2d392e58fcd64101
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E13 10008 bytes
font_02_sfnt_off0000a054.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA054 4324 bytes