Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5d8cbd82c4f91e…

MALICIOUS

PDF

34.3 KB Created: 2020-08-19 04:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d5fb4fb1d44e51c29294ee21b60274 SHA-1: bd9ea3a354a5ca7add3776c6067e6674ac094b79 SHA-256: de5d8cbd82c4f91ead93ba21c8544b9412109e4a676eb2f534491dd32c79fc80
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the text 'Sosyal bilgiler test pdf' and the malicious URL, suggesting a lure. The presence of a PDF link farm heuristic further indicates an attempt to distribute malicious content or engage in SEO poisoning.

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=sosyal+bilgiler+test+pdf
    • http://files.planninginblackandwhite.com/uploads/1/3/2/7/132710655/bobuzugipiz_renele_litazafurusagop.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/64754069162.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/todelabedaxebagajeja.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/77000636539.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/lekotorefobonimate.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/rerujeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/xulujorenu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/sewalubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/nitafuzigopuzuwubisegov.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/23105296593.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_off00004850.bin
02b6d67c4108a043dcf2f538bb3c6c38d8dac003197b6299965164df6bf23333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4850 5556 bytes
font_01_sfnt_off00005b3b.bin
a8b8c5bfe4c486298c07e9f348666202309d59817015c4a6b098c5aaa35a24c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3B 10180 bytes

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