Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4e7f3713b1780e…

MALICIOUS

PDF

72.3 KB Created: 2020-08-08 05:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad64d35b4d5657f798dda8d71e3da70d SHA-1: 2b69c23c0b2feeb8a272b22d41762c7fa93ccc87 SHA-256: 8d4e7f3713b1780ed89f732de02b874ddeb8ae064d7c611978b78874f99e9d49
150 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, specifically pointing to 'https://ttraff.ru/pify?keyword=haldol+decanoate+package+insert+pdf'. This URL is presented within the document body, disguised as a package insert. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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=haldol+decanoate+package+insert+pdf
    • http://files.standoutindallas.com/uploads/1/3/1/4/131406749/7263482.pdf
    • http://files.signcraftpdx.com/uploads/1/3/2/6/132696285/zujoxi.pdf
    • http://files.esolcentre.uk/uploads/1/3/0/9/130969548/344778.pdf
    • http://files.netanelbellaishe.com/uploads/1/3/1/3/131379039/a24947ecbafe334.pdf
    • http://nitev.mc-authority.com/uploads/1/3/1/8/131871478/6594333.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/70401621227.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/16978795140.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/the_one_ring_rpg_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/staheli_ortopedia_pediatrica.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/kivutotuxunage.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/the_black_temple_entrance.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/toputufajixonemux.pdf
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/urban_cyclist_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/ballade_pour_adeline_noten_einfach.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/htb_vs_hfsc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.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_off0000d45e.bin
988426743f60bd787027f9eceb19335fb3463ff9e953207bcd41b8ea2f34a773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD45E 5348 bytes
font_01_sfnt_off0000e69c.bin
6a8370965d4442be9723fb7f7f36a1dbbc0d0dc666e8d43ac0c733b08ccb839f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 14476 bytes

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