Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31186a7df8c0c75…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 14:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54266b437086ba2574f981e838b36f3f SHA-1: 31edb193b4b0e8949abb1582a7a9bf5fb9e241f3 SHA-256: c31186a7df8c0c75fe0f876e5e22129a29c5b0599763058f092b791f7f218b29
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the text 'Fever temperature chart pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. No scripts were extracted from this sample.

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.com/pify?keyword=fever+temperature+chart+pdf
    • http://files.barkncat.com/uploads/1/3/1/1/131164351/rejikupoxegamuke.pdf
    • http://files.brickitalia.com/uploads/1/3/1/6/131606822/nobenoju.pdf
    • http://files.latitudegeography.org/uploads/1/3/0/7/130738764/206321.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/setuzirevivekagevev.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/sazodixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/still_already_yet_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/zutonivixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/modnie_strizki_2015.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/29286271023.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/cambio_climatico_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/wotogexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/61060713626.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/comite_de_basilea_1.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_off000065e9.bin
09f6b730157186336b431827f587c9b854c103646b1e51e1a8d8f0a36974cf45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 5200 bytes
font_01_sfnt_off00007778.bin
cf10e431ceb937f2749b0800847e0374b65ed85672f59d9b5f17bf430f749144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 13416 bytes

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