Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8105465132d8fca…

MALICIOUS

PDF

40.7 KB Created: 2020-08-05 06:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aea4bb2e9704066c4ad3d8f09ee6cb05 SHA-1: c48ab7b7fbbcfbf485c77c3589c8b01a9331f4e2 SHA-256: c8105465132d8fca6d6178dcafc053c677f8e432a6159f4dca724427438ba3c2
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.ru URL, which is associated with redirecting users to potentially harmful content. The presence of numerous Shopify links, while some are benign, contributes to the overall link farm characteristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=alagappan+pdf+google+drive
    • http://files.2spoiledpups.com/uploads/1/3/1/4/131437423/gajuliwus.pdf
    • http://files.kumisillustrations.co.uk/uploads/1/3/1/3/131383456/7392188.pdf
    • http://files.curiouskidspreschoolprogram.com/uploads/1/3/1/4/131437701/257814.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/osrs_a_tale_of_two_cats.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/40057617070.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/16769475330.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/ganexodubol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/split_into_pages_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/jitovajow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/83556407826.pdf
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/80776574536.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/fezopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/lopeno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/71289352088.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_off000062bc.bin
4bffe27e669ad734a117428b3a81f04cbca616db4e4bd9dc2fea14a346fcaf9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 5080 bytes
font_01_sfnt_off00007427.bin
ceaa48db30de2f8694f99bd72fdd3f80e190dca7db74cbe549f62367b9a955c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7427 9916 bytes

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