Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca97ec06f63962d8…

MALICIOUS

PDF

50.0 KB Created: 2020-07-30 05:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b55dca5dee261bfad09584ab99314450 SHA-1: 68348194954dd6c6d3b540d2dcf204e391529f44 SHA-256: ca97ec06f63962d8602a8b6b573e3037b6746106ff8911af9123ee74a53cc336
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or redirection scheme. The primary malicious URL identified is ttraff.cc, which is known for redirecting to harmful content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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=machine+learning+pdf
    • http://files.chuysmex.com/uploads/1/3/1/6/131606640/5888260.pdf
    • http://files.ventproducts.com/uploads/1/3/1/6/131606065/komorofemo.pdf
    • http://files.kristenjoanphotography.com/uploads/1/3/1/6/131606923/webowarirokome-dezimanibanem-gexebijotamuk-biseviku.pdf
    • http://files.kristenjoanphotography.com/uploads/1/3/1/6/131606923/webowarirokome-dezimanibanem-gexebijotamuk-
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/sonaxibotefilidonuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/34491729393.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/98355180905.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bipifapokuwegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/vopusag.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/topulemalameduvafenef.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/linax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/ponenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/bonatiridudoduvedipori.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/dexos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/rikododovefipikalubovor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/84378071305.pdf
    • https://cdn.shopify.com/s/files/1/0438/2900/2390/files/92658493864.pdf
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/zuwasiv.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_off0000871c.bin
f763964905c6802a3efb18d8f59638191f515fd916c1bf3272a50971a5bd5338
pdf-font-stream PDF embedded font (sfnt) at offset 0x871C 4840 bytes
font_01_sfnt_off0000977b.bin
fd413c630fd936ae5c7263c13d3f3b3823eb1f6509e318d165e273cc6c362488
pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 10376 bytes