Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bd92b3d300eb55…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 16:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf8164b2ce853f687b0a6b023a28794e SHA-1: 9c61ee945d9c3ab7eff1223638a9af24ee95821d SHA-256: b8bd92b3d300eb55abb919d50db4072c611d14d1ce6354fbb394f8a23fc57dd2
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to PDF files hosted on various domains, including a known malicious redirector. The primary malicious link is https://ttraff.cc/pify?keyword=trox+sound+attenuator+pdf, which likely leads to further malicious content. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign links.

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=trox+sound+attenuator+pdf
    • http://tekanu.nikiclainos.com/uploads/1/3/0/8/130874359/2305964.pdf
    • http://files.bobsbigbuffet.com/uploads/1/3/1/8/131856907/15bc6f253fa899c.pdf
    • http://files.cubiclesmadenew.com/uploads/1/3/2/6/132683181/4eec8887.pdf
    • http://files.emilypassic.com/uploads/1/3/1/3/131398059/fixavijufore-xuruvixafupu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0802/2938/files/argala_stotram_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/kipuxu.pdf
    • https://cdn.shopify.com/s/files/1/0450/0160/5278/files/labewodowavesomifu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/52550788699.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8190/files/foxebezavaxoxume.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/edward_said_orientalism.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/cursive_writing_capital_letters.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/vapegoduliropifak.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/latelijerumufojixe.pdf
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/67221751782.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/48438964586.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_off00006297.bin
44205b53960349b7006ffb96b6caedab0e148175c199479b31fd83ade3bea61c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6297 5020 bytes
font_01_sfnt_off000073c1.bin
987c4a2620e4cf1a29f80b3940fa460cbab6e0fed29f73d24a86a0f558d891be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C1 11452 bytes

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