Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff546dcdc0f48b2…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 21:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680446e3917822bbb4d8d3dd1503ec3c SHA-1: 2ac56eadeae0a0e7d34159ca62ff830bcb5112b0 SHA-256: bff546dcdc0f48b2c356a0f688ea8ebed6fc2ee3e6730b25852b03b2028de35a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=android+retrieve+wifi+passwords'. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The file also contains a large number of embedded links, many hosted on Shopify, indicating a link farm strategy. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirecting the user to a malicious site.

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/wix?keyword=android+retrieve+wifi+passwords
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/the_jerm_msr206_utility.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/zekaxetufomuguwositenuw.pdf
    • https://cdn.shopify.com/s/files/1/0459/9011/7543/files/penimunerukasej.pdf
    • https://cdn.shopify.com/s/files/1/0452/7711/8625/files/wuwis.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/yasin_huruf_latin.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_762c6b81fe55475e8c21079cfa06bbcd.pdf
    • https://cdn.shopify.com/s/files/1/0439/9002/4350/files/8178767038.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/stock_market_lessons_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/geseto.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/digazumuwaxesuwajape.pdf
    • https://cdn.shopify.com/s/files/1/0440/7672/8485/files/sozelezalododadanujijewi.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/meningitis_bacteriana_adultos.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_off0000683c.bin
b2ae1551265334486a2380ba6e86ab92156778d28ade709de29a0c4abdcc047c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683C 5144 bytes
font_01_sfnt_off000079e6.bin
52a84ecfe499a1a22341404ca2dec6ddb8728a100505f91d76598cea743fbbb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E6 10024 bytes

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