Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a09b57307da240f…

MALICIOUS

PDF

37.4 KB Created: 2020-08-08 08:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b954454c4849db49b68db8c51be626c4 SHA-1: aef3de0829a269e51066a52d87ce1ed3a02f9d12 SHA-256: 3a09b57307da240fe886a49a60a5dd60a2d05571171d2e32326261d2d7ac3031
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'john deere 410 backhoe parts manual pdf', suggesting a lure for users searching for specific technical manuals.

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=john+deere+410+backhoe+parts+manual+pdf
    • http://files.acorridor.com.au/uploads/1/3/0/7/130775747/suwukaletajov-futuxivunu-kudumeduliwi-fusim.pdf
    • http://files.steppingstonetuition.com/uploads/1/3/0/8/130874474/784371.pdf
    • http://files.c2lconference.com/uploads/1/3/0/8/130874298/rakukowud.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/xifinuziz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/17261532712.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/36084107216.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/57467936198.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/troybilt_5500_watt_generator.pdf
    • https://cdn.shopify.com/s/files/1/0434/2802/0373/files/61782115666.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/asko_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/80349342391.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/hp_elite_book_8560p_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/zepekawotowofukiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/98109170611.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_off00005302.bin
744fb87e6475480ff287fa4343480906e25a9268ecd094f4a4447f57548ef1df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5302 5868 bytes
font_01_sfnt_off000066d5.bin
8d685cad879ca3fd4aab1d18312b81028b32d4debf88bfc66f84e8dd7b6b3506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 9864 bytes

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