Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf2b74cb33724c6…

MALICIOUS

PDF

42.0 KB Created: 2020-08-03 12:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f10e8038f8e69c0268aef83a33a32b SHA-1: 63f8254b5eac9666ab29f656d0d5391584c03a30 SHA-256: cdf2b74cb33724c66cb4817dad8c3690f774b72e060fd2f246a97e216940ea03
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which lead to a redirector service. The primary malicious URL identified is ttraff.ru, which is likely used to obscure the final destination of the attack. The document body contains text related to 'Ata 2020 thyroid cancer guidelines pdf', suggesting a lure to entice users to click the malicious links.

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=ata+2020+thyroid+cancer+guidelines+pdf
    • http://files.shinestudiohairsalon.com/uploads/1/3/0/7/130775242/4803000.pdf
    • http://files.gospelblue.org/uploads/1/3/2/6/132681772/dofufafabasudib-juxanak-tivimelenu.pdf
    • http://duxuxo.yourwrightdecor.com/uploads/1/3/2/6/132682787/1e2c3.pdf
    • http://gugedowu.fitnesssavage.com/uploads/1/3/0/7/130776257/2ebaa3b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/73000821768.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/zawutaxesevugisag.pdf
    • https://cdn.shopify.com/s/files/1/0438/0803/0882/files/accuweather_newark_nj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/25433491192.pdf
    • https://cdn.shopify.com/s/files/1/0430/9277/0977/files/best_don_t_starve_together_mods.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/wadulixawixage.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/soxukenijimopaxiviwizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/galokaratowuvaruwo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1918/7862/files/chemistry_tro_3rd_edition.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_off00006522.bin
0450770ebd16b24e8b52d2de04b43c13aef3a443f1210612611e4dbce3e8c04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 5780 bytes
font_01_sfnt_off000078dd.bin
8de05a982c430133f506b814ab3eee544100257edf21b625e175aa8c5f776a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 10028 bytes

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