Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d041cfce67b4917…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 13:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7ccacb73f31dcce9d02c09b8b14e3b SHA-1: fd5f8b593a6a94299417c88230007bd6d3d91bc0 SHA-256: 7d041cfce67b4917fe2ce70321bb7fef8d2037ab37b9b293e086a2095171bd5d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary links directs to a known malicious redirector at 'ttraff.cc', suggesting a malicious intent beyond simple SEO manipulation. While many links point to benign Shopify-hosted PDFs, the presence of the malicious redirector and the sheer volume of links indicate a coordinated effort to distribute malicious content or manipulate search results. No scripts were extracted, and the document body is heavily obfuscated.

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=best+open+source+chatbot+platform
    • http://mifutavuw.smbwriting.com/uploads/1/3/1/4/131407736/7385137.pdf
    • http://gajubi.enlivenretreats.com/uploads/1/3/1/3/131398020/tibak_birumetopuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/tuworabubanumop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/champion_3500_watt_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/96028981926.pdf
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/rodidanomuwog.pdf
    • https://cdn.shopify.com/s/files/1/0448/4753/0146/files/genesis_family_tree.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/jovilisagelub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/91329176953.pdf
    • https://cdn.shopify.com/s/files/1/0450/3116/2006/files/encyclopedia_of_mathematics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/16916263478.pdf
    • https://cdn.shopify.com/s/files/1/0447/4513/0133/files/67982455351.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/tabekagavorefazetigaz.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_off00006125.bin
ea287d693be22311fe0be9f02e352935ddf333a759d1e80b5a91aed0e3dbc17d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 5444 bytes
font_01_sfnt_off00007377.bin
8b4cb7f673ca21015595c337146ea8d36b672f4c433b211a7a9f953139c85cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 10168 bytes

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