Malicious PDF — malware analysis report

Static analysis result for SHA-256 426124b013c6523c…

MALICIOUS

PDF

114.7 KB Created: 2020-08-01 12:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e74ff6cf544a34490bac5add361f2e4 SHA-1: 1d3010266d7b85253de076e049c12fa38f3e94e8 SHA-256: 426124b013c6523c63a02c105619a2a33ccac2fe2d784a4b120a18a65e2a91b8
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a calculus textbook solutions manual. The primary malicious URL is https://ttraff.cc/pify?keyword=calculus+larson+9th+edition+solutions+manual+pdf, which likely leads to further malicious content. 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.cc/pify?keyword=calculus+larson+9th+edition+solutions+manual+pdf
    • http://files.peeplesdesigns.com/uploads/1/3/0/7/130776075/lupogekizo.pdf
    • http://files.pro-help.co.uk/uploads/1/3/1/4/131482822/towojakolulaxax_lubepamikububo_fagajug.pdf
    • http://files.justinthomas.net/uploads/1/3/1/4/131438708/zunonafiz.pdf
    • http://files.saintcatherineorthodoxchurch.org/uploads/1/3/1/4/131452735/5a18fb010efa64.pdf
    • http://files.distributivesolar.com/uploads/1/3/0/8/130813301/3170035.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/6041215244.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/810861154.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/88664692792.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/kozebop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9313/9364/files/11184012267.pdf
    • https://cdn.shopify.com/s/files/1/0430/0531/3177/files/dozadawusiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33971068516.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/gisexuzinevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/vizonosabedux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/75751305409.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/kabelogutilolakipew.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/povomuxaduwozexofo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/wapopizuwu.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_off00016973.bin
2df0ec481a02092c558726d1d7f641e0bc431223264d4eb581407d2a289ee281
pdf-font-stream PDF embedded font (sfnt) at offset 0x16973 2012 bytes
font_01_sfnt_off00017238.bin
58fe59c83f15c8528bf5060071f289a0b161c65be220a39690438662eb447d91
pdf-font-stream PDF embedded font (sfnt) at offset 0x17238 5456 bytes
font_02_sfnt_off0001848a.bin
13144f17e71fe779862494dfdb3b95cc3362876d02e45214a7a7509073bcc7c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1848A 18388 bytes