Malicious PDF — malware analysis report

Static analysis result for SHA-256 d565d1226a210b5b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 11:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fec5e36bacf1fba6402c57253a14c92 SHA-1: bc8421cf1bcecd6186d35b569f0e60d5f066a3c2 SHA-256: d565d1226a210b5b17f6a57d4bbd79efcb3b354edd72a427adc09e30ba62b2d9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=shaadi+mein+zaroor+aana+torrent'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious redirector URL and a seemingly benign PDF filename, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=shaadi+mein+zaroor+aana+torrent
    • https://cdn.shopify.com/s/files/1/0463/7078/3393/files/chunari_chunari_tune.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/home_assistant_trigger_automation_manually.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/norfolk_southern_hiring_process.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/cambridge_fce_reading.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_485ddfe69f66477dbed9c9c9607f0011.pdf
    • https://static.usrfiles.com/ugd/b8c837_313abcab9aa74276abf6d0758529c226.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/rosewugexiwovefudeturare.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/node_js_read_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/zotitidaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb275e7da9c0471490bf517e1f9ab0d3.pdf
    • https://static.usrfiles.com/ugd/0049ca_76f2b18704d94168be6c39c42bf0eca1.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc5c1ca9c9a94096a5d4d6580337202a.pdf
    • https://static.usrfiles.com/ugd/b56239_a9328ee8d4f64fd985b0737a991f0255.pdf
    • https://static.usrfiles.com/ugd/b8c837_33ed2aa250824ee2b529c83309b153c1.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_off00006575.bin
5e22d150aea999754bcd2e24216253006d9137e461eff97e1c860f3d89fafddf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6575 5008 bytes
font_01_sfnt_off00007659.bin
79e491344be5b53801a9a54052d7ed06fd1ddd73165c15b56b7d52d206c5ccba
pdf-font-stream PDF embedded font (sfnt) at offset 0x7659 10544 bytes