Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf770e188309ba2…

MALICIOUS

PDF

60.9 KB Created: 2020-08-23 01:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8140d2dbd5736f4d03146324a0e0b23 SHA-1: 4d05629c67d3625d29c48163df6306d94a75be6b SHA-256: 1cf770e188309ba25763d7117beb26665c4d50204070dde4b92a110666cb23d8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users with keywords like 'maps for minecraft apk'. The document body, though heavily obfuscated, contains the same lure and the redirector URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a phishing lure disguised as a software download.

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=maps+for+minecraft++apk
    • http://files.brainreachnorth.ca/uploads/1/3/0/9/130969755/tuzepazaxen.pdf
    • http://files.guillome.nl/uploads/1/3/1/4/131453432/memedimaka.pdf
    • http://davaligo.hda.com/uploads/1/3/0/7/130740592/wanivubuwosijewalej.pdf
    • http://files.mauricioes.com/uploads/1/3/0/9/130969061/830691.pdf
    • https://cdn.shopify.com/s/files/1/0430/0511/6575/files/ccs811_sensor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/98179200722.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/44850711910.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/43380909418.pdf
    • https://cdn.shopify.com/s/files/1/0435/4126/6587/files/destination_b1_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/49140959008.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/75275976072.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/definition_of_economic_efficiency.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/39311224911.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a383.bin
b3f476768f22466a22d5de7650ee1803ed58d5f8fdc8285e6392712d31bbea1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA383 4988 bytes
font_01_sfnt_off0000b45a.bin
859835de8f718ed4e8698241215e749aa09c2db0b0b25e623b6d8c8e0688c881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB45A 10476 bytes
font_02_sfnt_off0000d833.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 4324 bytes

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