Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebc02a3d9874b0f…

MALICIOUS

PDF

46.3 KB Created: 2020-08-13 03:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b583ec3acea29bd15580d067572f8fed SHA-1: 535ce2b07323a46bff364790bccc269f269218f5 SHA-256: cebc02a3d9874b0f5d14d0262e4724b7bb1fd6853ddce53bdda765e407a97a95
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but the primary link redirects to a known malicious infrastructure at ttraff.ru. The document body, though partially corrupted, contains the same keyword as the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=aikido+techniques+for+beginners+pdf
    • http://files.chtechlab.com/uploads/1/3/2/7/132740693/navobulevavi_nisuwenonam_wusijalanew.pdf
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.pdf
    • http://bolekugev.paulaingeneva.com/uploads/1/3/0/7/130775075/6773352.pdf
    • http://gelej.healinghandofgrief.com/uploads/1/3/1/4/131453150/sisedaxozoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/69983795497.pdf
    • https://cdn.shopify.com/s/files/1/0433/2113/1161/files/25373704139.pdf
    • https://cdn.shopify.com/s/files/1/0445/5153/6799/files/bayada_bucks_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/pogonagakix.pdf
    • https://cdn.shopify.com/s/files/1/0429/3214/2243/files/58735661390.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/juwufemomide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/cnc_turning_programming_fanuc.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/14460434128.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/dagavinodutedinokoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/7384712126.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_off00007673.bin
4649712b6cce898a79372b1206b6c3653b2ab59f96167a4ec800ced27b66184a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 5492 bytes
font_01_sfnt_off0000890c.bin
ff5244f9e1d58924680707ef4c14f102499b36eb6a9ce682e6dbfafd9c57073f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 10448 bytes

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