Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7fe03fc86eabc3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 23:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1efcf39b557ff6db55ec35648e5d84 SHA-1: 5cc4a127aca568d2589d2ab661abf2b4ded393e4 SHA-256: ff7fe03fc86eabc3cdadc9a2f1aa071bbafd1d79771dc70d590d4f14bc040914
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a link farm further supports the malicious intent of directing users to external, potentially harmful, content. No scripts were extracted from this sample.

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.com/pify?keyword=que+es+el+anabolismo+y+catabolismo+pdf
    • http://rizeg.bzdickstudio.com/uploads/1/3/1/4/131437812/3872258.pdf
    • http://files.presscoffee2go.com/uploads/1/3/0/7/130775071/4e94c27b9d9d9.pdf
    • http://files.thegreedycouple.com/uploads/1/3/0/7/130738988/33975.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/xonabememawavatamux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/masilodejusakon.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/nepezewavexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/96485030628.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/minecraft_pc_xbox_controller.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/31636488235.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/toxaxivasobovovud.pdf
    • https://cdn.shopify.com/s/files/1/0434/9784/8996/files/58883866850.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/rewilusipufikogad.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_off00005e0b.bin
5df25b6edf9a922a0c4d2f4f417e3693cfabebc760c7e055b3cc98b699f0e5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0B 5508 bytes
font_01_sfnt_off000070b7.bin
8442271bf56a4a4b03cb44f29aa8a11efc7bc8d1a9dcfbd9b9dd309614a1770a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B7 11300 bytes

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