Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb6af68d178c0c5…

MALICIOUS

PDF

46.0 KB Created: 2020-07-31 14:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f149166776f9a54753fa3bb2067d284e SHA-1: ac3347888898fd97fb83eb629df071a66ca6150d SHA-256: fcb6af68d178c0c536a4034d170e9b1199087c48a29740d8ab04103002da921f
130 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, specifically using an invoice or authorization letter lure. The primary malicious URL identified is ttraff.ru, which redirects to other content. The document body, though heavily obfuscated, contains text related to 'Authorization letter samples pdf', reinforcing the lure.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=authorization+letter+samples+pdf
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://files.lovefoodandyoga.com/uploads/1/3/0/7/130774994/gawovozafake.pdf
    • http://files.liamprinter.com/uploads/1/3/0/9/130969428/xemiluro-jujusipaxekuvej.pdf
    • http://files.lovefoodandyoga.com/uploads/1/3/0/7/13077499
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/68942128587.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/62412530384.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/xekadifijajamenepaxez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/rilegulemuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/83585594633.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/taxizulogudanoxakon.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/11525871758.pdf
    • https://cdn.shopify.com/s/files/1/0434/2566/1095/files/90549155900.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/63668005576.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/63628091480.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/45878325464.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_off0000766c.bin
743259e0537498527f89348181a768e4e06a6069f9f2f438ba83f60adbe5ad73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766C 5200 bytes
font_01_sfnt_off000087f1.bin
fc249a5257d3c13382e77cf64beedc89bda16774a24fcfa301b97989a1316147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F1 10356 bytes

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