Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3080067325b5d7…

MALICIOUS

PDF

37.6 KB Created: 2020-08-23 00:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a69c3934ed628e5b7225e7b624b98f3c SHA-1: ac300dcd2632f218ca1e08973cc5fa7aae5c83a2 SHA-256: bd3080067325b5d79167d68d6de5a2aae26924c306871d9e9e65693d8df15013
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains the same URL. The presence of numerous links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=il+y+a+c%2527+est+exercices+pdf
    • http://sikujos.agefriendlysarnia.com/uploads/1/3/2/6/132696056/lerur.pdf
    • https://cdn.shopify.com/s/files/1/0438/4735/2480/files/34669782004.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/sodejozosagag.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/gozezadedugirizogoxubazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/kitefefururomizekanawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/gugoxode.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_off00005238.bin
b6f28a8551dc0a253501bdc7780919ee13361dd9d1f2580950796db6e9bc301a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5238 5288 bytes
font_01_sfnt_off0000644b.bin
e8ef7c924b2abe434524a79ae0536021ddd6a0760c244450f46550fdc17b158c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 11452 bytes

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