Malicious PDF — malware analysis report

Static analysis result for SHA-256 513ae36b8286f367…

MALICIOUS

PDF

44.8 KB Created: 2020-08-31 05:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 547838b9a58eba1310307090b1506e31 SHA-1: 6a18a51872b291b3ecde0b45dc96d94a6d5a6c1d SHA-256: 513ae36b8286f3672b265a117c5f20ddafc6a7fd4de086be14f457752c2a7769
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. This suggests a social engineering tactic to drive traffic to malicious infrastructure, disguised as a resource list. The document body and metadata are consistent with a PDF generated by wkhtmltopdf, likely used to host the link farm.

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/wix?keyword=armor+modeling+and+preservation+society
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/de_aenigmate.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/92617150258.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/constructivist_learning_theory_schol.pdf
    • https://static.usrfiles.com/ugd/67e251_1fbbb721fe2b43b0b6fa717f21d2ca29.pdf
    • https://static.usrfiles.com/ugd/b8c837_78649abb3d80431f8a9bf0224a081a4f.pdf
    • https://static.usrfiles.com/ugd/2d1648_63dc98c1964745b78d99fd5b7b78cf7a.pdf
    • https://static.usrfiles.com/ugd/c0b427_c63a57104119482c92db3f77b677bc8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_13904c4f41c241c282d43c591d4faf7b.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_off0000706a.bin
b9f89ab3d9d7ebcdf870ccbd4376f86e3c73f6e86a0bd898796685f5e95cd889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706A 5544 bytes
font_01_sfnt_off00008331.bin
00307d6a479dda7d228788d9d6b26f8c27c1f03eef9a17f1a4e04643ed128972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 10600 bytes

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