Malicious PDF — malware analysis report

Static analysis result for SHA-256 26523dc59f845683…

MALICIOUS

PDF

38.9 KB Created: 2020-08-19 22:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c1a1d2b1efb986c304ee0647aa87730 SHA-1: ee1a7f85c8541f7b82e905ea9ad131ab1ac9eda0 SHA-256: 26523dc59f84568311a19b5bdb8cd39ca923e926acc5b334984c2fabb8cbfc3d
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains hosting other PDF files, and one critical link to a known malicious redirector. This indicates a likely SEO link farm or a distribution mechanism for further malicious content. The presence of a malicious redirector URL is a strong indicator of malicious intent.

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.ru/pify?keyword=census+and+sample+worksheet
    • http://files.msjacksonselementaryclass.com/uploads/1/3/1/4/131408616/xemobodibaveb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/43776869781.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/suloneluko.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/cable_tray_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/99991195034.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5841/files/88398257806.pdf
    • https://cdn.shopify.com/s/files/1/0450/3601/1678/files/lightroom_tutorial_beginner.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/27224590003.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/94870834234.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/tifabugerigujun.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_off00005b80.bin
ff8b83bd00a813db5d90268fe7e827680a66eb5742ca0d74428407192ba3f054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 5260 bytes
font_01_sfnt_off00006d3f.bin
f784cb2ce22008f23b0bd93d39b7c9a2723d1c034af9cbe332dff562da98cf81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3F 9928 bytes

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