Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b83b0e0780903ae…

MALICIOUS

PDF

39.8 KB Created: 2020-07-31 21:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a91ecf6094f4b520f44a12c53b586497 SHA-1: 3535c378f4ee6cc5333b52971ea4ad80f5e4abd7 SHA-256: 9b83b0e0780903aebb37f671a5f8baa4d41c1e9ee0e804adb92679010334f647
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword suggesting a manual. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier also strongly indicated 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.com/pify?keyword=viper+remote+start+manual
    • http://files.hammcrafted.com/uploads/1/3/0/9/130969175/906000.pdf
    • http://files.fiftythreestarsandasun.com/uploads/1/3/2/8/132815752/lozozox.pdf
    • http://files.nannypalooza.com/uploads/1/3/1/4/131437535/bunelekogosiz_zoredegalu.pdf
    • http://files.outlawvegan.com/uploads/1/3/0/7/130739937/a8e2b830362bc4a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/97675896673.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2269/files/guxeruzezikapozivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/mifekolekaxatepugif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/94694161770.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/3643654092.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/vebig.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/30532206635.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/79536397274.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/jokunapukudoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5692/files/35995377220.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/dudabomomofufalefebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/zedaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/kexeraba.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/wetipoxukelidilag.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_off00005f8c.bin
146276f7124a601fabcec8cb72d59c4c9a411d31f50c70a3a08663776037b7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8C 4932 bytes
font_01_sfnt_off0000703b.bin
e44981b4dab3ae9f4fadfce42bbfeff7519790b352e7129fb81b2731aaa3cb50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 10028 bytes

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