Malicious PDF — malware analysis report

Static analysis result for SHA-256 442ec31f442da2b7…

MALICIOUS

PDF

42.4 KB Created: 2020-09-04 05:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ff0ab18fd284b0e279702c9a3783d1b SHA-1: 8c0e7a04ad08fc52c43afdbd3df23fe2106fccaf SHA-256: 442ec31f442da2b7674cf0f51407c463cb93d53a839a7a88e6bd0bfd196bd0f1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates the presence of a link farm, with the primary malicious URL being ttraff.ru. The document body contains obfuscated text but also explicitly includes the malicious URL, suggesting a lure to external content.

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=bikeman+performance+reviews
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/minecraft_gullivers_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/magopinuxokesovudazepijit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/tv_guide_listings_sarasota_comcast.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/83602175188.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/big_data_in_healthcare.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/febaravopozimil.pdf
    • https://cdn.shopify.com/s/files/1/0435/4133/2127/files/24076960338.pdf
    • https://cdn.shopify.com/s/files/1/0454/7097/4118/files/rofedupalexosixumobewe.pdf
    • https://static.usrfiles.com/ugd/7e84b7_6b336116d76b48feae506cc16b529150.pdf
    • https://static.usrfiles.com/ugd/b42fd6_bb140f2868c440669ee3be0a88ae59dd.pdf
    • https://static.usrfiles.com/ugd/a91264_a8781844760b41f5974f346822b79a3b.pdf
    • https://static.usrfiles.com/ugd/7a359d_549b014b564e4c4cb8f9ef8414894820.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_3110417f4266402ca81991e6e21938f9.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_off000067b8.bin
1a6b1c663053c9e4128be5133d8ef3f1b1f39178fbe50de4249e118d6867570d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B8 5396 bytes
font_01_sfnt_off00007a16.bin
042319da97a60abca32089eea9c15e9b0da7990f5d1607df78136b5b7ac08a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A16 10124 bytes

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