Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd9bdc0ed40a580…

MALICIOUS

PDF

46.6 KB Created: 2020-08-26 16:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03fbba11390275d32e107b05537781f7 SHA-1: 7edcad8b4e9f663998df46ac0bc2e890c87263a3 SHA-256: 1bd9bdc0ed40a58065c0356b379d32816e538746e8022256355144212296dedd
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 external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on cdn.shopify.com, suggesting a link farm or redirection scheme designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=laurell+k+hamilton+anita+blake+quote
    • http://files.kunstzinnigelusters.com/uploads/1/3/1/4/131438211/siguzuvodujosub-fadumegibeteb.pdf
    • http://files.doulababes.com/uploads/1/3/2/6/132681558/4764474.pdf
    • http://files.cecvehicleleasing.com/uploads/1/3/1/4/131438397/futera.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1766/files/distraint_deluxe_edition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/kazuluwed.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/analyse_2_smpc.pdf
    • https://cdn.shopify.com/s/files/1/0430/8821/6217/files/77316496698.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/5021202575.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/gibunazovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/59440575390.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/sony_hbh_52.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/73176008535.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/gagupafuvebolejololanafi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/85155488803.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/96223136577.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/lifivarujapopituva.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_off00006bb2.bin
dda045de500a27a747c175f955fbb5680ed3c35c7622585a291d49d3110e09d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB2 4900 bytes
font_01_sfnt_off00007c2f.bin
5b433440d2fdecbbc7d91d2a4349ed1999dcf72da1f357f75ad43f07d912b11f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 10276 bytes
font_02_sfnt_off00009f67.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F67 4324 bytes