Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d26b0b1ece3d2ef…

MALICIOUS

PDF

36.5 KB Created: 2020-08-29 09:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 613f387d4cc7c8bd2e241d325d8023c1 SHA-1: e8dcc086320714313ff5ea0ad2808e6a53b9214b SHA-256: 7d26b0b1ece3d2ef54691ab91ce594b32bc47f211ea903b34f1918c92f1c215d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by the heuristic. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious 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.club/wix?keyword=harbor+skyrim+together+download
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/43042792739.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/kijatefenifusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/11721311760.pdf
    • https://cdn.shopify.com/s/files/1/0435/9618/5763/files/simile_worksheets_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://static.usrfiles.com/ugd/b8c837_808ed6bc52454164bcfb3ea2763fa2b2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdf
    • https://cdn.shopify.com/s/files/1/0450/1661/3014/files/druid_pouch_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/94844003636.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/96973828169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://static.usrfiles.com/ugd/b8c837_a9cc06c6fb374e959498cb5485af8591.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d9b60dec7474b108c153c26de6bbfe4.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_off00004e29.bin
40e6ba3afad4cf0cc3506ac14df2ed567a81bef11feaee6db86e944036392710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E29 5600 bytes
font_01_sfnt_off0000611d.bin
79f5f57969f90549a0a169d12a4b270df3e3f0e253301b81b3afe2e834b0ca52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 10944 bytes

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