Malicious PDF — malware analysis report

Static analysis result for SHA-256 29588a5e14e27cec…

MALICIOUS

PDF

50.9 KB Created: 2020-07-20 02:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a53ef23be32a2e035b8e1a30c00170b7 SHA-1: 13bc35ec5dcfc90fd10b51448c3df6c2ad54d8c3 SHA-256: 29588a5e14e27cecbd30486a54dd4116254f795993435c4b67841409c42fbd68
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is ttraff.cc, which is known to host redirectors. The document body appears to be largely obfuscated or corrupted, but the presence of the 'wkhtmltopdf' string suggests it was generated programmatically.

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/wb?keyword=2017%20alfa%20romeo%20giulia%20quadrifoglio%20manual
    • http://files.michigannordicfirefestival.com/uploads/1/3/1/4/131407823/jikasonolujiw.pdf
    • http://files.oceansandforestsadventures.com/uploads/1/3/1/3/131398075/2041483.pdf
    • http://files.richquinlan.com/uploads/1/3/1/4/131406861/wuzuj.pdf
    • https://suwigus.files.wordpress.com/2020/07/64012006566.pdf
    • https://pamowuvesez.files.wordpress.com/2020/06/27611081094.pdf
    • https://vijudokamaji.files.wordpress.com/2020/07/3008905707.pdf
    • https://kesegomub.files.wordpress.com/2020/07/18098184137.pdf
    • https://tovotuwag.files.wordpress.com/2020/07/5928265336.pdf
    • https://zomobok.files.wordpress.com/2020/06/karelimimiwujif.pdf
    • https://vedasovapi.files.wordpress.com/2020/07/menulowuru.pdf
    • https://tazalolej410971325.files.wordpress.com/2020/06/ralon.pdf
    • https://jezovuri.files.wordpress.com/2020/07/fazeme.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/59952139092.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/56206876892.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/98994308000.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/26919743668.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/14733751651.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/kufazeroguxorukux.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_off000085a1.bin
953fe5af734ee8bc0fe9b76839a472878c5d5a590ed6185ae64a78bab2e2c445
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 5288 bytes
font_01_sfnt_off0000976e.bin
2426ae2ca08563bf369d71ece92263ba967ec18ccf5dae655e196ffc41427c7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x976E 11168 bytes