Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8e3d08a387ecb5…

MALICIOUS

PDF

63.8 KB Created: 2020-08-08 17:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd2fbd0738535af2ffd722eefdb844b4 SHA-1: a4570defb561fb50b41f5b9b49beaeee3158c98e SHA-256: 9a8e3d08a387ecb579670dffc47ef6f64d2ce13d55ae171e46d3c53a37b346d6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=aromanian+language+pdf'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL and text related to 'Aromanian language pdf', suggesting a lure.

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=aromanian+language+pdf
    • http://files.michellebaril.com/uploads/1/3/1/3/131379296/aa5f39bb9ba1d.pdf
    • http://files.wpscclays.org/uploads/1/3/1/3/131384552/rulizanugujug.pdf
    • http://files.newtongeorgiadems.org/uploads/1/3/0/9/130969254/0ae955c.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/wagumokibufamoredegikofet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/sologavumajor.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/dutiwovakuvefav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/98454654340.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/ropimepazofatefaso.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6519/files/44351154201.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/14185306055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/besusisukikulukepusiza.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_off0000a036.bin
90c475d229320f50f07dade21ebb7bc43daa19c29b68907aa17f45fa903fe768		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA036 4976 bytes
font_01_sfnt_off0000b0f8.bin
41a9c8f1ebc7b9a571b575ce3c86eb8ed5a3af43bbed25481e1ad9f6b233d66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F8 16692 bytes
font_02_sfnt_off0000e459.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 4324 bytes

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