Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f85eeba47be390e…

MALICIOUS

PDF

38.5 KB Created: 2020-08-04 21:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3caa42dd77761a86739e768a7d6f0ad7 SHA-1: 34801a85e38a142b4fcd4e6a7b91d4a2826d5bf6 SHA-256: 1f85eeba47be390e1a359cab1513f362850ea0fbec5334a49e37b0242d18c980
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a primary link to a known malicious redirector at 'https://ttraff.com/pify?keyword=approximation+by+superpositions+of+a+sigmoidal+function+pdf'. The document body, though heavily obfuscated, appears to contain this URL and other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious redirection attempt.

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.com/pify?keyword=approximation+by+superpositions+of+a+sigmoidal+function+pdf
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
    • http://files.battleaxie.com/uploads/1/3/1/4/131453253/8772273.pdf
    • http://files.beauchampfarmsva.com/uploads/1/3/1/0/131070846/2220667.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/tibivogeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/dijakedifurudamomefogoraz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/10348453463.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9839/files/20845886338.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/circumference_of_a_circle_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/rimilozesixabuzolefiponoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/77301540093.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/2013_audi_a4_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/best_epub_reader_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/75745414391.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/87311998140.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/5557708728.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_off00005495.bin
f1fccee715b1ed6ca5b3252d40b109cc41012b7d6b6b86c675487b5c31ab10b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5495 5772 bytes
font_01_sfnt_off00006832.bin
993e3e94c270cc00515aa3e0d8641d145a5af99f31426775dc829980bea064d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6832 11156 bytes

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