Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb6e84890f03286…

MALICIOUS

PDF

59.9 KB Created: 2020-08-08 02:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc6a35b4110a44df8cfd3cf031cd7868 SHA-1: d9bfa2c5b7d2fe10ed009f66b46b57f5b5b89aa6 SHA-256: ddb6e84890f032866b83e3127599bb6e51866a74e365c98debfee450a302b1a1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious or unknown domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and legitimate-looking file names, likely intended to deceive users.

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.cc/pify?keyword=bel+canto+singing+pdf
    • http://files.wabanaflowers.com/uploads/1/3/1/6/131636987/jadusuriwov_zonolu_vitetuviwa.pdf
    • http://files.updatedfl.co/uploads/1/3/0/8/130814423/4445657.pdf
    • http://files.gwheelerfishingguide.com/uploads/1/3/1/4/131438260/paxel_sakimegojikixol_zujej_rozoja.pdf
    • http://files.charbeneaudesigns.com/uploads/1/3/0/8/130874254/33cee01305c769.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/grammar_exercises_pre_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/logixibubibav.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/tipos_de_adjetivos_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/72182989605.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/rezanakunosufepexov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4096/3750/files/muvivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/betij.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/zabumimolojitiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/46324180498.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/medicinal_chemistry_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9254/1589/files/xevililogowunines.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/govukutezojipibasadi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a040.bin
233005706b489d775a1614c5ac6f3953273ae2036168e5bd3c8ee0c1b7cc4e7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA040 5064 bytes
font_01_sfnt_off0000b189.bin
4dfd74e1bb4f26faee391768a9f81ef30ee573784e58b080a26102432c727360
pdf-font-stream PDF embedded font (sfnt) at offset 0xB189 10324 bytes
font_02_sfnt_off0000d4cc.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 4324 bytes