Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf683799e7fa7946…

MALICIOUS

PDF

77.5 KB Created: 2020-08-21 20:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bed9d05a63700391b1938432a24404d SHA-1: 9e034f8676a4f40de02037350feccd9efec8c4d8 SHA-256: bf683799e7fa794634be5e6dac3391f1491d8559ce3ba90594ae4ff6bfc540d6
120 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, disguised as an IELTS speaking PDF. This indicates a likely phishing or malware delivery attempt. The PDF also contains a large number of external links, many pointing to Shopify, suggesting an attempt to blend malicious links with benign content or to leverage compromised sites for hosting. No scripts were extracted from this sample.

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=ielts+speaking+pdf+september+to+december+2018
    • http://files.absentlinks.com/uploads/1/3/1/4/131407530/rafawitevubel.pdf
    • http://pafubesel.alexandrahaleyart.com/uploads/1/3/0/8/130874679/2381894.pdf
    • http://files.netherhaughfarm.com/uploads/1/3/2/6/132681352/ziwozerobudivogi.pdf
    • http://vazikiza.tysprettythings.com/uploads/1/3/0/9/130969192/523a3c178d9730.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vewurobafug.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/38625573660.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/the_pardoner_s_tale_translated.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/94096878829.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/cgfm_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/environmental_biotechnology_principles_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/value_proposition_canvas_download.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_off0000f089.bin
a878fdf2e7e25df6c95cd28cf2c99464b2702daad374bb2231c6229074946d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 6136 bytes
font_01_sfnt_off0001054b.bin
3f3f26f5963679abc139b98879c6e55597cdb3000b930a13091250ed81617abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 10304 bytes

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