Malicious PDF — malware analysis report

Static analysis result for SHA-256 f314f03d71e3b8a9…

MALICIOUS

PDF

43.6 KB Created: 2020-09-08 02:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0205dad126189a5cc30fa4ba123a6952 SHA-1: 303cde455699fd1a6719c4473c3580eaa63c9cb1 SHA-256: f314f03d71e3b8a9acfbbed8843cbfe4aa992c908d49c929995c5baf7b316718
150 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.ru/wix?keyword=userform+vba+vlookup'. This URL is likely used to redirect the user to a malicious site. The document also contains a PDF link farm heuristic, suggesting an attempt to game search engines or distribute content broadly. While no scripts were extracted, the presence of the malicious redirector and the nature of the link farm indicate a phishing or redirection attack. The document body contains garbled text but includes the suspicious URL and a benign-looking PDF URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=userform+vba+vlookup
    • https://officedepot.ugc.bazaarvoice.com2563rewhttps://www.officedepot.com/images/us/od/
    • https://static.usrfiles.com/ugd/2ddd39_72636a77a95543b78482c206145f2305.pdf
    • https://static.usrfiles.com/ugd/1e8759_b163a350eb4a45608dc4b70d863118de.pdf
    • https://static.usrfiles.com/ugd/b30cf0_f3c7a4fba86343088cbecb682ac29d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/xasipunujozikovisasobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/australian_tourist_visa_application_form_subclass_600.pdf
    • https://cdn.shopify.com/s/files/1/0440/5270/9526/files/2003_ford_f150_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/fawiwibufom.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/6034336009.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/lokefemudiw.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_off00006cc3.bin
9a8a34c22ea37758b3e3a257cf739163abdd2e47bfb9dd9dbc24f2318852c4c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC3 5304 bytes
font_01_sfnt_off00007ebc.bin
2c0be37c509b450fd79561b285672c27c317b5e270e37386aef0dea9f6ff4a95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBC 10272 bytes