Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b469411f483527…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 23:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a29613bc14d6aed0aa83c252e1d970bc SHA-1: 6126d9c0b79651e4cc0a3a6c294e3d7a31220855 SHA-256: a3b469411f4835270aa7eaef9bdfc3169ea4aa36bccdf9223d340f8e9243b0fb
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc', which is indicative of malicious activity. The document body, though heavily obfuscated, appears to contain text related to cancer and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious.

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=tudo+sobre+cancer+de+colo+de+utero+pdf
    • http://files.pureandsimplebible.com/uploads/1/3/0/9/130969358/tetatovoto-lupuxokadu-zunomala-jakem.pdf
    • http://files.ifafrog.com/uploads/1/3/1/8/131857650/8037009.pdf
    • http://files.wholearmorministry.com/uploads/1/3/1/3/131384113/313f8492c4.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/45734244658.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/bomunivotagabusorow.pdf
    • https://cdn.shopify.com/s/files/1/0449/4072/2331/files/vawepavozod.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/rujidubudovoxita.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/85221364678.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/69983981991.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/ibm_vision_statement.pdf
    • https://cdn.shopify.com/s/files/1/0438/3522/8317/files/96271082464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/rubik_s_cube_yellow_cross.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/64345802259.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/51271253725.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_off0000653d.bin
36f283ff7fa45ba45b38237c87ac24efb30184ae79daff6a91f75dc663625d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 5236 bytes
font_01_sfnt_off00007712.bin
dd020e73f79898dd34232f8c8042998ad626fbbd68d0c41927d29a5a16e9d584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 11496 bytes

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