Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a41e21318c8e1b…

MALICIOUS

PDF

41.4 KB Created: 2020-09-04 04:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49d53a29dd46ef51f0237efc0464ff5 SHA-1: 83dce874ed80e475875c339c5a8eeac8b72b220e SHA-256: 78a41e21318c8e1be3147d061bcfd5de549ddd6c1f161b877a2196341c12ffc4
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=project+man+hours+template'. The document body, though heavily obfuscated, contains text related to 'Project man hours template' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external resources, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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.club/wix?keyword=project+man+hours+template
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/loweporeniwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7186/4993/files/80774045650.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/butakenenomivijazeja.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8769/files/moxuzodukatiriludizuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/38127813815.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97098861098.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/sodug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/jatutalojunilafaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/7855583773.pdf
    • https://cdn.shopify.com/s/files/1/0431/6744/9239/files/66940004516.pdf
    • https://static.usrfiles.com/ugd/1e8759_b1c46ac913424226a103632adf632d88.pdf
    • https://static.usrfiles.com/ugd/704566_224f8683d1e24ed3b008f152277e4454.pdf
    • https://static.usrfiles.com/ugd/4d935e_3f988ead56db4d8bb58aaf88982e863e.pdf
    • https://static.usrfiles.com/ugd/3225da_b37700a8c76f464493fd250419f928d8.pdf
    • https://static.usrfiles.com/ugd/38955b_58da0ad82bac4ceaa209258825e6b1ac.pdf
    • https://static.usrfiles.com/ugd/23924c_deaf34ab43eb43ab80cb96656f9d5816.pdf
    • https://static.usrfiles.com/ugd/808d8c_e101eb05fdf64d11902bf0a1b0018588.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_off00006519.bin
1e19e66969c1180de80aebab30d8b222b5780753b53ed45fc1d3b9387eca1d6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 5248 bytes
font_01_sfnt_off000076c5.bin
b8a01d9c1e5ba5ee5f114f1c97f8d45b281b1e81e1a38a446aa578133538d582
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C5 9764 bytes