Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe827e431d1d6dcc…

MALICIOUS

PDF

43.6 KB Created: 2020-07-31 18:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1813ff1e54760bbc2cedb6509a9e1a9 SHA-1: 64a9b1144a9048196ce38d9af4373e97265fdf1b SHA-256: fe827e431d1d6dcce5be89efcca12afe0a6810d1b45405f39812a6f421dc6625
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel users to further malicious content. The document body and embedded links suggest a lure related to torrent downloads, specifically 'The incredible hulk'. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy to distribute the malicious payload or redirect traffic. No scripts were extracted, but the primary attack vector is the malicious URL.

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.cc/pify?keyword=the+incredible+hulk+torrents
    • http://files.kinderoopreschool.com/uploads/1/3/0/7/130740586/kajeninu_razuwup_vizudoxod_jejizujopevi.pdf
    • http://files.bruinsyouthcheer.org/uploads/1/3/0/9/130969944/e59f58f5f1f6.pdf
    • http://files.vonsmartexercise.com/uploads/1/3/1/4/131453560/2237649.pdf
    • http://files.yogitreewellbeing.com/uploads/1/3/2/8/132816042/voxiwebujanogomowafu.pdf
    • http://files.kempstoneastmethodist.org/uploads/1/3/1/3/131379280/pudijedavixuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/5639628208.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/94760845860.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/poluburidu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/20078802762.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/56826443358.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/36400145767.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/rapogodulolej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/dujilipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/82183584982.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_off00006b9d.bin
b085985d772b8965a0069bf8d398cb183fd3c92b4058804d44133d3893a6a737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9D 4972 bytes
font_01_sfnt_off00007c79.bin
66399e8d223c8bb021926236c21aba3b307d0c084a62d244ec1fd0617627c863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C79 10896 bytes

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