Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6779b6afa08c7fa…

MALICIOUS

PDF

112.8 KB Created: 2020-08-03 15:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43b6f9bbc83b04e856472d25d38a2f4b SHA-1: f004fc21e31530f015850b739f64c0a8a9229842 SHA-256: b6779b6afa08c7fa160c9c5fb4ce81f8e85b1ef5c0014be6d88df84f5d3c0ec0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one heuristic specifically identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=waiting+for+godot+a+tragicomedy+in+two+acts+pdf'. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains text related to 'Waiting for Godot' and the wkhtmltopdf tool, likely serving as a lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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.com/pify?keyword=waiting+for+godot+a+tragicomedy+in+two+acts+pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • http://files.lacindra.com/uploads/1/3/1/3/131382092/47a85b94e46.pdf
    • http://files.karenjrader.com/uploads/1/3/1/3/131379543/611601.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/wuwufobobexisofinegolu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/46644149219.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/56622582978.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/pakesuronuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/dugudobakupezibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1948/4839/files/33555371578.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/all_nurses_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/89944602984.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/how_to_contribute_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/raxosexasobur.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/34044539242.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/patok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.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_off00016f30.bin
a1f74c5fd9dccf1b8aff66124f6a5b44060e76ddc304586cc1d32c26d2ea9b7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F30 5436 bytes
font_01_sfnt_off000181af.bin
d4eec5e1c21e76a9e89c5a74539ead33b33da067c18ac5bcbe4f216b8e9e5c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x181AF 11064 bytes
font_02_sfnt_off0001a6c6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6C6 4324 bytes