Malicious PDF — malware analysis report

Static analysis result for SHA-256 3111c2d3a9427938…

MALICIOUS

PDF

50.8 KB Created: 2020-08-12 08:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52710d7db76b2b65839342f1ac58d35d SHA-1: d672f330c04e349f0711d409c8e3c2703fb3dfd8 SHA-256: 3111c2d3a94279383b8f3502882af5c0d4a38d4d4181dc6f1a839b41a8c0920f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or link farming. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely intended to lead the user to malicious content. The document body, though heavily obfuscated, contains the target URL, suggesting a social engineering lure.

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=bearing+false+witness+stark+pdf
    • http://livomuwo.methodeffects.com/uploads/1/3/2/6/132681670/1642395.pdf
    • http://files.ronfrancisfineart.com/uploads/1/3/1/1/131163872/8659313.pdf
    • http://gopaj.caricatureparties.com/uploads/1/3/0/7/130776791/3c8129d6b1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3944/files/fikowesede.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/5729641345.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/bijidepoxikotegofawizoro.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/capteur_de_temperature_dallas_ds18b20.pdf
    • https://cdn.shopify.com/s/files/1/0435/6656/3487/files/umbrellas_of_cherbourg_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/99712557576.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/vanimekabunopove.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/maxufuwunevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/nofitaxidotopojesej.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/pamevasefiwewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/cost_accounting_in_navision.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/8846327447.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/reality_therapy_worksheets.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/
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/88

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086ad.bin
bfcf9dd0c4bb412367395b4e81562e5250203754c2dbdd6dd32cafe9ea725f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AD 5416 bytes
font_01_sfnt_off0000993c.bin
5edef5b584b34bc288bba96121b984ad28b1ded97eb91e0ff589d15474df4139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x993C 10728 bytes

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