Malicious PDF — malware analysis report

Static analysis result for SHA-256 f137cd1a672a35eb…

MALICIOUS

PDF

66.9 KB Created: 2020-08-01 10:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 567c3e08c4fb8beabe55cba70bbe7394 SHA-1: 313fc866216b819706f0334fce3acbb776f97a24 SHA-256: f137cd1a672a35eb7973153eec108935501948d2f715b48e8fc422c0725da3b5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a malicious redirector, linking to a URL that is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, contains the URL which is also listed as an IOC. The presence of numerous external links, many pointing to Shopify, suggests an attempt to obscure the final destination or to leverage benign platforms for hosting malicious content.

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=post+tensioning+manual+6th+edition+pdf
    • http://files.cherokeecheetahpta.com/uploads/1/3/1/3/131379894/1783266.pdf
    • http://files.taylororrstudio.com/uploads/1/3/0/8/130814515/jodizuwefefotizibe.pdf
    • http://files.msckylesportsforspecialneeds.com/uploads/1/3/0/7/130776592/latasimetubatexasomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2387/files/zijijijagabozejetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/73494937788.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/3841961332.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/rowetew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/37834795018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/ziwefulodamapugagoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/epsxe_2._0._5_bios.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/93376136827.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/neviderodibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/9762133233.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/410_shotguns_at_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/nupafuwerogob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/44152098265.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_off0000c953.bin
6d64ec25a87c5c382adc9ec2a9c717f4b2a73fbef4ebc39a1e8f219fe19dbfa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 5516 bytes
font_01_sfnt_off0000dbec.bin
38253446496dc49f6a57096b41ff961a5dc79daa6957f26c0659121fb833f410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 10064 bytes

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