Malicious PDF — malware analysis report

Static analysis result for SHA-256 545955f31c4997b2…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 03:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8d9c916e5bd9d58d286d6a2b211a88 SHA-1: 55affe46fddfe527249d1be4e113875de590b4a0 SHA-256: 545955f31c4997b21d788dd962751f1d4273c4f2ee108c552604e1582ba1efeb
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for "automobile engineering books pdf". This link points to ttraff.ru, which is flagged as malicious. The document also contains a large number of embedded links, many pointing to static.usrfiles.com, which is likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicates maliciousness.

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=automobile+engineering+books+pdf
    • https://static.usrfiles.com/ugd/d3758e_8a2dd46a37704a62be04caace56d3b3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2a0d872d3a7454e8ce9df9342e8e8b0.pdf
    • https://static.usrfiles.com/ugd/cb5dea_fa05be5a75f4499586b7be2d9dc7e655.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/27863060814.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/banasumuwakoxinuwifotaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/kisusuxumaremoxuwukuxinak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/12435042908.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/environmental_audit_committee_fast_fashion_report.pdf
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/b91566_713d0b03df38496094761159d4d68111.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63a33f508754923bdda1c87aa9d44a9.pdf
    • https://static.usrfiles.com/ugd/353d00_4f45fec0b286410f928012da32eb8953.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_off00006128.bin
ee8d53cb7630d6a301f5b992ae65a71e80186f03576d18ac21f3e59154642573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 5344 bytes
font_01_sfnt_off00007342.bin
4b257c460fd496aae313f4beeb785f6378ce531e5d1d33e7b9c2615f8a4002f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7342 10068 bytes

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