Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9ed38612a1b746…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 08:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c43ef57b330fdb76ec69de7cce16b4 SHA-1: e94b76feacc88e3cb3f4adbd6465674e00d66092 SHA-256: ac9ed38612a1b74608bffd250fb6ee3a9423a5c2923e0b4fa9a219383f904c29
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is ttraff.ru, which is used to redirect to other potentially malicious sites. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its role in the attack chain. The presence of numerous links suggests a distribution mechanism for malware or phishing content.

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=duke%2527+s+anesthesia+secrets+5e+pdf
    • http://files.zoningatl.com/uploads/1/3/2/7/132712268/128c84f13b8.pdf
    • http://files.cavycouncilofvictoria.com/uploads/1/3/0/9/130969714/ea75c31.pdf
    • http://fivaj.whakamaramaschool.com/uploads/1/3/2/6/132682892/zefibe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/best_app_to_annotate_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/calendario_lunar_menstrual_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/bomopi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/wizapadeber.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/12955265029.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/mmorpg_of_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/roblox_troll_gui.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/72977861665.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/waled.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/xefim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/mcdonald_s_menu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/fifoxixuvomibinovadofa.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/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006121.bin
e2ee9cde2784f5631fd41fb528f527971c288fcaab7cb868c38cbfe192c5f275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 5432 bytes
font_01_sfnt_off000073a5.bin
cf2a62799e8362c0d36d780cbf0cc49822dddf7c85cf635e269a1210f3992a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 10200 bytes

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