Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba29512617f2b29…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 18:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 016e9817fc525a4419ccb8497d43278d SHA-1: bd6116c23446a2ba1cef522e41e4e61f5618476f SHA-256: 8ba29512617f2b29bd8ad6879ea0655556b0628ac52a37d9f25c8b85fcddb105
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a lure related to 'Corpse Bride online'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. The presence of numerous external PDF links further supports a link farm or redirection strategy.

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.ru/pify?keyword=corpse+bride+online
    • http://files.gatheringsforgood.com/uploads/1/3/1/4/131453399/858315.pdf
    • http://files.the21stcenturybody.com/uploads/1/3/0/8/130813108/2542227.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/65099920201.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/week_in_a_year.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/76664076695.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/35779430726.pdf
    • https://cdn.shopify.com/s/files/1/0435/5742/1224/files/fivararasezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/vovuvamuzurelinibip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/voxar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9595/files/symbolic_interactionism_in_sociology_of_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/fundamentals_of_cost_accounting.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_off0000621a.bin
8e0276db2847f2ed146f3eed8341fc793906ef2307af0285f92d8b1eeb99c5d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 4788 bytes
font_01_sfnt_off00007262.bin
d08d5ba747da49286fb85c490f75511f7a31294384712f6c6328fbebb7a540b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 10012 bytes

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