Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5f99c5a7312a09…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 11:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0c39c6d802faea732bad066d63d57ac SHA-1: ee16a08091a2049b34dc63ed906a35083288a975 SHA-256: ed5f99c5a7312a094fbac221d0153e9f63a0f911086fe3263aff6f15f5390297
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains, but one critical link redirects to `https://ttraff.com/pify?keyword=mahabharata+full+story+in+simple+english+pdf`. This URL is flagged as a known malicious redirector. The document body, though heavily corrupted, contains the same keyword and URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=mahabharata+full+story+in+simple+english+pdf
    • http://files.dkgseedfarms.com/uploads/1/3/2/7/132741430/nirenipomojajew.pdf
    • http://somamena.flatlanderfarm.com/uploads/1/3/0/8/130814328/2747218.pdf
    • http://files.thewordwasmadeflesh.org/uploads/1/3/1/4/131453725/5727106.pdf
    • http://files.new2ufashions.net/uploads/1/3/1/4/131438111/16b3f553201.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/neruxosefupeved.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/xibabadegavin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/xuvuzexok.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/bd_facs_aria_iii.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/calendar_2017_india.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/xurewaronusa.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/mebawugorofubigigaxix.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/86515032942.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/85566219539.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/mafowekob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.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_off00006ca6.bin
bf5c09afccd4a1f038c9938a0d6e2cd5b0e26528ae38abeaf9ff947945d903a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA6 5704 bytes
font_01_sfnt_off00007feb.bin
80801e7891e92acd74ad2f6be65f4fccbe71e59d84164c101bdaa0bb93714c51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 9816 bytes

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