Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3895c0d0bb14d2b…

MALICIOUS

PDF

61.9 KB Created: 2020-08-02 05:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a05d917d8c90007c4dfb0bf83748e28f SHA-1: f06f8810915f65645101f4e71fabe2dbf3291014 SHA-256: d3895c0d0bb14d2b147360b2bdc04c69a273a95ce69a8b5b12dc1ebc600b6cb8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URL 'https://ttraff.ru/pify?keyword=pthread+condition+variable' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting it is the primary lure. The presence of numerous links, many hosted on Shopify, indicates a broad attempt to distribute malicious content.

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=pthread+condition+variable
    • http://files.parentchildclinic.com/uploads/1/3/0/8/130813314/xidefiri-sodano-dufiporagaf-wugokupumem.pdf
    • http://files.rev-pile.com/uploads/1/3/0/7/130739648/bikuka.pdf
    • http://files.miekemanschot.com/uploads/1/3/1/4/131483305/5351439.pdf
    • http://files.musictheoryhelper.com/uploads/1/3/2/6/132680955/1123819.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/tomupovajej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gibafizaxuzezeropujigubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/xubixebozufuxubur.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/vobuniwimevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/dufigokijabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/warriors_of_chaos_army_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/jamiziwikobogixaxijugi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/sepasavujefuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7702/5446/files/raligewitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/xanodiwabokovabusepabuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/gogelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/wametaposi.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_off00009b69.bin
8194667b09395098ad5879d69496fa19357390ce17de53e7ea846c31b27a1560
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B69 4840 bytes
font_01_sfnt_off0000abc3.bin
32c7950a91a3cf780730816b8c0c8a34836330b1a910928c37d81fcaa5ab0f4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xABC3 15600 bytes
font_02_sfnt_off0000dc98.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 4324 bytes