Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fce8e4c2a20934a…

MALICIOUS

PDF

47.0 KB Created: 2020-07-29 04:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a1d1017b952edb21749ae66f78896e SHA-1: c5a0b8e92664e1106148a3b312a3c25965c597c4 SHA-256: 4fce8e4c2a20934a7b093f94906d3883a96a000e06d3cfaf45626ec8b9ecb446
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a recipe, likely to disguise the malicious intent of redirecting users to potentially harmful content.

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=lasagna+recipe+with+butternut+squash+sheets
    • http://files.concertedchaos.com/uploads/1/3/1/4/131452841/devavuvuwub_jaxutivuregu_nakevuru_tesususomubiwi.pdf
    • http://files.moyo-up.de/uploads/1/3/1/0/131070367/114237.pdf
    • http://files.msnlawoffice.com/uploads/1/3/0/7/130775658/tumafapova-jamupebozofurok-worofonefi-netod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/48278454083.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/65862149879.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/17974849779.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/60602889998.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/bofarem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/96514327583.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/pominuwuzed.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/puredazukofeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/pubesewonekegerixijana.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/58397719845.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_off00007954.bin
9c9c10347dbc8bd8ca90e13c4777541edeb980ce6adb1881e03c39f25585651b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7954 5236 bytes
font_01_sfnt_off00008b23.bin
88c74478584ca41dfbac7dfcbdb09daa27be1658174d549b5d04bae34a5046cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B23 10568 bytes

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