Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67ae9bcb66fd8af…

MALICIOUS

PDF

42.5 KB Created: 2020-08-13 13:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab6aa2274dc46c6df792ff602935bb5a SHA-1: ec61839dae096b3fa77636589fa9b28b0c6f3a47 SHA-256: e67ae9bcb66fd8af3733dc9e75adb96ae76b8abbf93e0a5378126c22889597e9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One prominent link, presented as 'electronics engineering projects pdf', redirects through 'ttraff.ru', a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly indicate a malicious intent to redirect users to harmful sites.

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.ru/pify?keyword=electronics+engineering+projects+pdf
    • http://desuwawu.xudedesigns.com/uploads/1/3/1/3/131381787/3a44b44180d21a6.pdf
    • http://fopuji.polarmininginc.com/uploads/1/3/1/6/131606731/8292878.pdf
    • http://files.ewrcarter.co.uk/uploads/1/3/0/7/130739318/zetunatorugokitobid.pdf
    • http://files.stlukeglenellyn.org/uploads/1/3/1/4/131437623/dajasuwejexatut.pdf
    • http://files.mylocalvendor.com/uploads/1/3/1/3/131382346/848d8d.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/tovopuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7303/files/bullish_engulfing_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/zexer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/75645408831.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/coordinate_picture_graphing_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/wukilewejigib.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/vakunuvelijalagupukemufos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/mathematical_analysis_s_c_malik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/lopikejebegamikopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/8499883338.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/redarumarigepejanunejovi.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_off0000696d.bin
9b2643cabb5d85d6fcb93f570fc45c0bfb7d5796b3fb8dda94631c44ccd69bd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 5144 bytes
font_01_sfnt_off00007b02.bin
40fc0c7c7e1d5ea147d031f955abbfa7a7b8fa5b8520940a3e94cfca23ace53e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 9992 bytes