Malicious PDF — malware analysis report

Static analysis result for SHA-256 426ea924e2ea3169…

MALICIOUS

PDF

49.7 KB Created: 2020-08-06 06:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b75cff93c1ec0b726ae29dd63e1c64ee SHA-1: e93ffce71b63bd3d81e9e81715fa6f3678d9ff55 SHA-256: 426ea924e2ea3169378b053d30e48b17e572013e2a83280c88f6a339d9a88804
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=business+administration+short+notes+pdf'. This URL is designed to lure users into clicking it by disguising itself as a document download. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO manipulation or to obscure the true destination. No scripts were extracted from this sample.

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.com/pify?keyword=business+administration+short+notes+pdf
    • http://files.holisticfamilycare.com/uploads/1/3/2/6/132695569/4103487.pdf
    • http://files.survivalbetty.com/uploads/1/3/0/9/130970023/48fb4771142d9e5.pdf
    • http://files.ridgelyes.com/uploads/1/3/2/7/132740399/fevigux.pdf
    • http://files.murdermysteryparties.com.au/uploads/1/3/1/0/131071167/balaxewixon_wivaram_kumur_lefidu.pdf
    • http://pugeri.burkittsvilleruritanclub.org/uploads/1/3/0/7/130775403/734428673caba26.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/soxofanelozarogafazaxexak.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/thiruppavai_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/nabofirufezagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/munakusirofoxafiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/mevejovajomozunamimigurub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/fonut.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/john_deere_d130_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/ripping_audio_from_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0435/5935/4517/files/am_i_evil_tab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4564/files/konikozagokunep.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/camillo_sitte.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006850.bin
60abcac9b3a36efe3f5639eeb4b731db70e5d822a1b894daa58fdfb3e43c70e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 5180 bytes
font_01_sfnt_off000079b8.bin
b8c7116a9587d045c74ebf749524d229d1d41d5e5afe61a47d8464775570d908
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B8 15276 bytes
font_02_sfnt_off0000a8ed.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8ED 4324 bytes