Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8d0e2460b090ba…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 21:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fc3581136ce271051896e64a1b89a3f SHA-1: 95e8e2b5e91febe5e2ba919a07b03e212d58e957 SHA-256: 9b8d0e2460b090bac87f4934ec9520293ba69e20ce98c816c6a00d35e886b5be
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The primary attack pattern involves directing users to malicious websites through a deceptive list of 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/wb?keyword=rendering%20techniques%20pdf
    • http://files.quasicaramelle.com/uploads/1/3/0/9/130969190/8945407.pdf
    • http://files.kefaloniaholidaysvilla.com/uploads/1/3/1/3/131383998/135709.pdf
    • http://laxira.tlc-travels.com/uploads/1/3/2/6/132682156/ruxovizuputa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/97140513243.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/85580311557.pdf
    • https://cdn.shopify.com/s/files/1/0439/5712/5278/files/make_file_smaller_mac_preview.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/99231772166.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/95666422732.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/anesthesia_machine_mindray.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/xakekesuxibuborufiniwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/rolarozovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/tefuwijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/japanese_abacus_its_use_and_theory.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_off00005b93.bin
9d3ddd74f507d0ad32e42cc0bc8938194bb3c33ea44beaf79d5474bf1cdfdccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B93 5080 bytes
font_01_sfnt_off00006cc8.bin
fabeeabff3ae71992410f338fb833fe7ceed0ddbb5632a9e811ed07cbd89eda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC8 9924 bytes
font_02_sfnt_off00008eb9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB9 4324 bytes

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