Malicious PDF — malware analysis report

Static analysis result for SHA-256 8140de88a25f52fe…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 20:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e9d337282fd79a62a3e9dab29ff2bf7 SHA-1: 1e07a2e710fc23c338153bc39730ae1075ff3109 SHA-256: 8140de88a25f52fe3f2c978cda703b565ed58c0a1f8edcbfe33f892f6e54d558
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Battleground game mod apk' and the malicious URL, suggesting a lure for users interested in such content. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content or redirect users. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further malicious sites.

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=battleground+game+mod+apk
    • http://files.belenartleague.com/uploads/1/3/2/7/132740249/judixitogobo_tarefupi.pdf
    • http://tumube.virtualrealitysensation.com/uploads/1/3/0/8/130814297/6643118.pdf
    • http://files.78thfrasersmontreal.org/uploads/1/3/1/1/131164063/muvame.pdf
    • http://files.rmackson.com/uploads/1/3/0/9/130969731/vawoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/87820702756.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/flexbox_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9895/files/nust_admission_circular_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/revimelizexiforelamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/89454795078.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/9750445311.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/bearing_math_problems.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/sanwa_analog_multimeter_manual.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_off00005c32.bin
f86fab063c90ede85e66cedc076b7a1bc91e2782b1332914ef54df8ff07ca9a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C32 5216 bytes
font_01_sfnt_off00006dd6.bin
ea423f1cd78547e7b50f6acc1ef0f16266eb89e917c390fc10b9d03ea983eb2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD6 9976 bytes

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