Malicious PDF — malware analysis report

Static analysis result for SHA-256 78017f1e0911a2f8…

MALICIOUS

PDF

34.4 KB Created: 2020-08-25 12:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8c50d43e7e8ead323e20477c23194e5 SHA-1: a2d1621b17615dd5dcf4be5ff7c1f8f8b19999f4 SHA-256: 78017f1e0911a2f8b2f3f7fc515597aa2402f877cc9e5747fdcdb11ebc7f2e2e
128 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 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF SEO link farm, hosting numerous links to external PDFs, some of which are hosted on Shopify. The presence of a 'download button' lure further suggests a malicious intent to trick users into clicking these links. No scripts were extracted, but the primary attack vector appears to be redirection to malicious or deceptive content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=anjana+songs++now
    • http://files.littlesirestaurantandlounge.com/uploads/1/3/1/3/131383318/latakuvizowoje_dolasidab.pdf
    • http://files.elkhornvalleyhrc.com/uploads/1/3/0/8/130874612/8397628.pdf
    • http://files.oddityodysseys.com/uploads/1/3/1/4/131437604/18ecd497f2.pdf
    • https://cdn.shopify.com/s/files/1/0440/3275/3829/files/types_of_antenna_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/72063936968.pdf
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/13286374186.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/kitchen_furniture_design_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/1639230457.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/92918136496.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/mysql_drop_index.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/zurubevowepibatawe.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_off0000496d.bin
08e9da88af7be9dde68ce1eb7bc10d385653cdd42523177420a3aba3c3d726fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x496D 4880 bytes
font_01_sfnt_off00005a36.bin
9f0d29fdfd9c9683e3a9ce635d7b4b02903a7dc9b7fcbbafbf560a78c80761a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A36 10332 bytes

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