Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe0b0f7fcc385a2…

MALICIOUS

PDF

34.4 KB Created: 2020-08-08 23:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41fbbc8801bdaf94ec0fe34db3ab896c SHA-1: 95c40746ef08cc211f0396be4dca0dae8b39bc80 SHA-256: dfe0b0f7fcc385a20967df3d802ee0dc80063e5224804502d68f3b1d1d0f4dbc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same redirector URL and other URLs pointing to Shopify, suggesting a link farm strategy. No scripts were extracted, but the presence of a malicious redirector and a link farm indicates a high likelihood of a phishing or malware distribution attempt.

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.cc/pify?keyword=uncle+tom+s+cabin+worksheet+pdf+answers
    • http://files.dejohnsonauthor.com/uploads/1/3/1/4/131453543/8351906.pdf
    • http://files.spinninpolestudio.com/uploads/1/3/1/4/131452958/4450793.pdf
    • http://files.utopiatravelonline.com/uploads/1/3/1/3/131381721/lonegeziwukisifakaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3982/files/definition_of_management_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0441/0333/6088/files/git_ssl_no_verify.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/fulemaridokaxoraxusarata.pdf
    • https://cdn.shopify.com/s/files/1/0443/8907/3062/files/kannada_bhavageethegalu_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/21607339680.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/gujufiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/2072852027.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xonenasojofaxaberoxawi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/37576843865.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/38204374904.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_off00004573.bin
0f96e6381b54b44ac54b8c4e7e8125a6a1b6b804d0172377e74420671327748a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4573 5680 bytes
font_01_sfnt_off000058ab.bin
16670fe2f1a7dd038ab5760033bd30f23004358eb6fdb28581e5635833f92417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AB 10004 bytes

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