Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a55f8917c2bb22…

MALICIOUS

PDF

69.2 KB Created: 2020-08-14 11:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaba302e6900a43da179c13f3c70777a SHA-1: 3420320b536550e3fbd653584045f04fe1d840df SHA-256: f4a55f8917c2bb227e5f3b1503b02a507561457494bd5810c54c4f5e3784e657
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.com, which is disguised with a movie title to entice clicks. The document also features a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for phishing or malware distribution.

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=baasha+movie+free
    • http://files.dixiedeerclassicstore.org/uploads/1/3/1/3/131384429/jawoxatukibar.pdf
    • http://files.sekimitsuscholars.com/uploads/1/3/1/4/131438571/dotufuzojer-soxapedavow.pdf
    • http://kazefasod.simplycreativetreasures.com/uploads/1/3/2/7/132740515/zeroguxokogegaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/97611407242.pdf
    • https://cdn.shopify.com/s/files/1/0440/7482/7941/files/google_balance_sheet_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5008/1183/files/what_does_albatraoz_mean.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/zotimizirejepinosupapit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/nebidanirugevurele.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/autumn_leaves_tab_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/72073296385.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/95772963571.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/15344266641.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/i-_5_oregon_accident_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/client_call_log_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/wind_death_knight.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/70571779449.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a01f.bin
4dced15a3fd83eb3403dcf8335a7c01b70fa19ba2bff87e6b22a908e6063f974		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA01F 5084 bytes
font_01_sfnt_off0000b142.bin
44057b4b39e2861df5ea207206c7b3480ab0d0ee8331df0fa5e2a573f2f4a755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB142 11360 bytes
font_02_sfnt_off0000ce2c.bin
eca9345fcd2df88c924d3a66d6a0df7101cf9b4f744eb277de5a331680ec1791		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2C 10400 bytes
font_03_sfnt_off0000f1f3.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 16164 bytes

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