Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a826bb2c464b141…

MALICIOUS

PDF

48.9 KB Created: 2020-08-25 14:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ae424db40f70d437cc235aebab9e46 SHA-1: e66ee67d7d5d058c0123e0d2406fbeec06efa56c SHA-256: 8a826bb2c464b141825e19f01b827ea174e562657d592915049a685f37f9b66a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=infarctus+du+myocarde+cat+pdf'. This URL is likely used to redirect the user to a malicious site. Another heuristic indicates a PDF link farm, suggesting a common spamming technique. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its 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.cc/pify?keyword=infarctus+du+myocarde+cat+pdf
    • http://files.lakesidehighschoolavid.com/uploads/1/3/1/8/131856257/244680.pdf
    • http://fidijat.beechwoodlanding.com/uploads/1/3/1/4/131406437/6ea7c.pdf
    • http://files.wisewomanliving.net/uploads/1/3/0/7/130738792/lavopu.pdf
    • http://dilubam.robbywjohnson.com/uploads/1/3/0/7/130775413/muzegazekagoxolom.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/types_of_archaeological_sources.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/82091550170.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/carnivore_herbivore_omnivore_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4090/files/69948714982.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/56593761248.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/ripoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/46614236951.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/class_12th_time_table_2020_up_board_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.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_off0000813c.bin
d6ae69062c470c292d298ff7708d138358c6b5e0e7371831809c2ab66cad18aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 5308 bytes
font_01_sfnt_off00009331.bin
590eec57770c6bfc47b263f8b88d087240114a98c7a6002fce7751c77b969df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9331 10480 bytes

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