Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd609c762f4b4de…

MALICIOUS

PDF

33.7 KB Created: 2020-08-20 17:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d62271d11a2935a6bbf405326107c50 SHA-1: 501e352f9c3c623c6b29a003ad079b37fe9a191d SHA-256: 8fd609c762f4b4de849542b7d8613f2054044d159c73b85108e69e9c5f3a309c
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 identifying it as a link farm pointing to malicious redirector infrastructure. One of the primary links directs to 'ttraff.ru', a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a large number of external links suggests an attempt to distribute traffic to potentially harmful sites.

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=5.+s%25C4%25B1n%25C4%25B1f+sosyal+bilgiler+yaprak+test+pdf
    • http://files.christopherjohnsonarted.com/uploads/1/3/1/3/131379113/9693403.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/dakiru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1373/3533/files/16098128441.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/zagiriv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/apt-_get_install_git.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/shopdog_sawhorse_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lezoxaxus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2523/files/wudexokedugezivax.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/nasejuwirunoxuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/apc_accountancy_class_12.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_off00004148.bin
5dd92f0cfd971aa0f7014ec5a7428c239732736406d020e5f7d20e0e055a1283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4148 5608 bytes
font_01_sfnt_off0000547a.bin
c93c936cc49bfee14bad3f2cb9340b5eaa9850ba71214f810e8d172da4bdfdd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547A 11100 bytes

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