Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04090d13a40e0dd…

MALICIOUS

PDF

39.1 KB Created: 2020-09-01 10:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84bc6faa549a11f9941ff949f25fb914 SHA-1: c8941697c92210184d1ae4b0aec8c3cf2d5771b2 SHA-256: b04090d13a40e0dd3aaaebdd069e928c75320a5badf501132139bda478d0dce8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the same URL. This URL likely serves as a lure to a malicious site, potentially for phishing or malware distribution. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, suggests a link farm or redirection infrastructure.

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.cc/pify?keyword=bangla+video+baul+song
    • https://static.usrfiles.com/ugd/b8c837_97c468cfd3ee45e4b0c3034c15c84f8b.pdf
    • https://static.usrfiles.com/ugd/80c1db_15222aa80d5b47a2977eaa3a699f1392.pdf
    • https://static.usrfiles.com/ugd/e5412a_4b88b03afa2b4ca3b0877df7d93c197f.pdf
    • https://static.usrfiles.com/ugd/191a6d_3029ac58861546f583499a27fecd4cfb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/wozoooaaaal_sssslsl_a_is..._opzd_gnun_w_ip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/depletion_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/48990220982.pdf
    • https://static.usrfiles.com/ugd/cec570_818b21fd827d45f69053e413dd9de2ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ccba908413f4b75b4dbe3ec35274bd2.pdf
    • https://static.usrfiles.com/ugd/ba3095_6d139cc9d8464cac9b2406630ae1c076.pdf
    • https://static.usrfiles.com/ugd/8b97dd_b6cda2b4b5c14ba5a6ee16bcefdbb663.pdf
    • https://static.usrfiles.com/ugd/a48928_6c9beafc454e41d0b254575e89edb68e.pdf
    • https://static.usrfiles.com/ugd/c345b0_6e544f7faac34380a6ef5d40277fee10.pdf
    • https://static.usrfiles.com/ugd/1cfe37_11fc67bf53644e7a818c6986f258a3de.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004733.bin
518847d3ab0108c88eb376b7a21605c9ed700ddce05033e5d956b16edbfe94b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4733 5144 bytes
font_01_sfnt_off000058c7.bin
311f03ffcf9458ddd55815af74fe22d0dfaf4025e974d1408b707580d9ac84a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 6628 bytes
font_02_sfnt_off00006e31.bin
cf96d771b017993d23cfb45c7f51aca2bdd82f22538f38364292f97c1636e05e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 9728 bytes

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