Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad58e1390ea4a036…

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 22:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ffc8788b8ee58bd13b9bef5ae6f0107 SHA-1: 094f79d5afec791b6bc0a37822755ec82d3cc5c0 SHA-256: ad58e1390ea4a036a804059b4679684cb1ff40b09f7e3b319b58aea53864ea2a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=try+everything+shakira+mp3+download'. The document body, though heavily obfuscated, contains references to 'try everything shakira mp3 download', suggesting a lure for pirated content. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the ultimate malicious destination. The file was authored using wkhtmltopdf, a tool sometimes abused for generating malicious PDFs.

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/wix?keyword=try+everything+shakira+mp3+download
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/7716362592.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/zerefadenutizoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/performance_car_stores_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0434/8080/9625/files/7078574426.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/acls_algorithms_2015.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a1f6474fed54c249223072402c99dc0.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_f0828534e4f64b8b81e0081dd49dffb3.pdf
    • https://static.usrfiles.com/ugd/f46427_635defdabf9d4d7f81406b2ea9fad0cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d6882410fd848d0a33e1b415cfd021a.pdf
    • https://static.usrfiles.com/ugd/b8c837_64069673e5bd42459bcd90bf7354534d.pdf
    • https://static.usrfiles.com/ugd/f84671_f7f712e36b074f64a1c079aca6d072d3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/gadutopomokuwelimitezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/5033139535.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/choose_the_most_appropriate_answer_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/66091167655.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/destination_b1_scribd.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_off00004649.bin
dbdf74bab42000a531fad64ca103eca39aedcfc80259033ef9557bd7fe178802
pdf-font-stream PDF embedded font (sfnt) at offset 0x4649 5804 bytes
font_01_sfnt_off00005a01.bin
345c2c306a5ec4e493ad3642b96b580b455bcb4756d866e1a8c0e26a1d8df5fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 9568 bytes