Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffa6fd0665fba95…

MALICIOUS

PDF

57.6 KB Created: 2020-08-10 06:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c9fad0fffe159f9a72133da6366db3 SHA-1: 3592e99a0ad960a5b07563724001b31b24fb4475 SHA-256: fffa6fd0665fba9546688f6ac1daf114beeabf191285587a382ca6fa812e164e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=etiology+of+trigeminal+neuralgia+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one leading to a Shopify domain. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The file's purpose appears to be to trick users into downloading a malicious PDF, which then redirects them to harmful content.

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=etiology+of+trigeminal+neuralgia+pdf
    • http://files.mackaydoula.net/uploads/1/3/1/8/131856205/79b1f.pdf
    • http://files.brownleeschools.com/uploads/1/3/1/4/131438245/vesesur_nageguvexi_nozotixepovu_mesuzenabawuj.pdf
    • http://files.mywinningjewelry.com/uploads/1/3/1/4/131482944/vijekuxamezomab_fiwuxib_lepeguzobug_romixowog.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/10798691908.pdf
    • https://cdn.shopify.com/s/files/1/0428/0241/3735/files/5e_monk_way_of_the_long_death.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/sasifuwamadoginunonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/66125553092.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/32570896409.pdf
    • https://cdn.shopify.com/s/files/1/0437/1228/2789/files/86444250915.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/85194765797.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/associativismo_e_cooperativismo_sebrae.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/legend_of_the_red_dragon_movie.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/86101805425.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/lujab.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/71347090115.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/alfabet_po_angielsku_wymowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/57303556850.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_off00009e21.bin
8fe44777e780e49d782b7b02835c1275dcd577f60b3e8b72e9545246c8fd19d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E21 5240 bytes
font_01_sfnt_off0000afe9.bin
e068cf8c123d327681d38282d9264fa858f22398099d74efe21b55c33f73d4e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE9 12940 bytes