Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fb20bfce9770b4…

MALICIOUS

PDF

48.3 KB Created: 2020-07-31 14:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 039bcfd636983fc489a2345550a734fd SHA-1: 0e6df2ee4f22545e41712ef3c3188a6096a8848e SHA-256: 92fb20bfce9770b43e8f94a7b0eefaf4718b8a94e01e4d573758acb1aa1ddf33
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=credit+risk+management+in+banks+project+pdf
    • http://files.africanandcaribbeandelights.com/uploads/1/3/1/0/131070402/d7ad3.pdf
    • http://files.mgventerphotos.com/uploads/1/3/0/7/130739962/9124252.pdf
    • http://files.orovillesecondaryteachers.org/uploads/1/3/0/7/130740625/68bb702.pdf
    • http://files.xn--ettrfrdjuren-vcb4v.se/uploads/1/3/1/1/131164452/7b2317d00.pdf
    • http://files.isoandbusinessexpert.com/uploads/1/3/0/8/130813797/noxodak.pdf
    • http://files.mgventerphotos.c
    • https://cdn.shopify.com/s/files/1/0430/8674/1655/files/20169375132.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/93476751869.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/baberuvusam.pdf
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/sukikowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/vudisoligizaluvepikowe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/kututewerozet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/47698252256.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/58572688830.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/75179584925.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/65188679006.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9018/files/nazizumijulurat.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/99560581235.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/turopasufero.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_off00007d5e.bin
4ab42d7abb71ea706ae9903697a45de2bc7bd0d7a062b9d41ddc116b2066c8d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5E 5536 bytes
font_01_sfnt_off0000901d.bin
985dfa602d987ad4e3ac288bbe063c80f380fde570e481726b7e343c1bc5ecb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x901D 10400 bytes