Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9112c58b74006b5…

MALICIOUS

PDF

47.2 KB Created: 2020-08-23 06:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a28da2f2466c6167c7ba1fe23cef16 SHA-1: 5402f8c79a44d30be109e5241d36e9ff8d2b339a SHA-256: d9112c58b74006b5973f0e0a58226475c7594abd80ce637879c5fed192a82bf7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a lure for a free game download. The document also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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.com/pify?keyword=battlefield+3+premium+edition+free++pc
    • http://files.rhbconstructorainmobiliariasrl.com/uploads/1/3/1/8/131871729/mezuxilogavewem.pdf
    • http://viruveza.circlemstudio.net/uploads/1/3/1/3/131398125/vepujumabege-mubigejabega-sutujitanovasov.pdf
    • http://files.sweetcorndevelopment.org/uploads/1/3/0/7/130739814/1552040.pdf
    • http://fusaj.tidyaire.com/uploads/1/3/2/6/132695540/nijoxaxis.pdf
    • http://viruveza.circlemstudio.net/uploads/1/3/1/3/131398125/vepujumabe
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/felolinozus.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/famofogep.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2093/files/98340136955.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/nozesobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/getamubipafusunuxuwuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/87617913377.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/72675034676.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/pdf_file_reader_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0464/4903/3384/files/lutsen_mountain_fall_color_report.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_off00007910.bin
197b6b8fca1a561fe5e97978eb3cdd6d36b57a8e8f70ea16d192235e28c096ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7910 5336 bytes
font_01_sfnt_off00008b1e.bin
0f9e58c37bfbfbe9479bcab61b741e3f0cc694f87b4f9e5bb0cca0902cf78031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1E 10652 bytes

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