Malicious PDF — malware analysis report

Static analysis result for SHA-256 258f7ecef23829f5…

MALICIOUS

PDF

44.1 KB Created: 2020-08-21 11:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0e17f1d70d565a8e65093cd28eaf0d2 SHA-1: ce2a80a17c89725b8fb4834c16fdc4270cd91771 SHA-256: 258f7ecef23829f58d8a46f86f1ea2890852b49b5d13474797758a2a6fe2a592
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link pointing to a malicious URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for 'Wow classic warrior leveling guide horde'. The presence of numerous external PDF links suggests an attempt to manipulate search engine rankings or distribute malicious content. 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.ru/pify?keyword=wow+classic+warrior+leveling+guide+horde
    • http://files.joshuaarguellesphotography.com/uploads/1/3/1/4/131437005/ce3143423.pdf
    • http://nekobesu.indiarosekushner.com/uploads/1/3/2/3/132303382/jazobigezezilodof.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/52931229187.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/85566219539.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/57285333305.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/56920074677.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/systematic_error_vs_random_error.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/17737392058.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5072/files/pesivig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/mefowisexekidoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/94821472028.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/raluxekoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/zujigasepigufab.pdf
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/sample_letter_of_appreciation_for_support.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/zedidogaxoponutapijud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/all_about_space_august_2020.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_off00006e17.bin
035e25cb81801f35b214a5837aff1994a1b41184a4495023315088fe83b25eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 5368 bytes
font_01_sfnt_off00008060.bin
d500c4b06d96bf05ff658d1677b99e6a51b9c622027dadd9bf46b5f69d8f18f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8060 10272 bytes

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