Malicious PDF — malware analysis report

Static analysis result for SHA-256 4266134cffb476b8…

MALICIOUS

PDF

65.6 KB Created: 2020-08-15 04:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3b5312c9d60a34670362941f1d9a57f SHA-1: 2a28b1ba48479d55bfb584b7d88ad4eeeb928eee SHA-256: 4266134cffb476b814abef68849d70f3091393bcfb3f8afbfe0a08fa62f0b5c2
158 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

This PDF document contains embedded JavaScript and multiple links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=aeroperu+603+accident+report'. The document body and heuristics suggest a lure related to a news report to entice users to click the malicious link, which likely leads to further malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=aeroperu+603+accident+report
    • http://files.stjohnsecofin.com/uploads/1/3/1/4/131437222/xoxamavikil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/adding_and_subtracting_fractions_worksheets_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/zirisekiwixedajepekuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/jobobidojuduriwakakaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/xabufazolorugad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/xopixexopadewibujejibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/68072822720.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/losikivevelafirun.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/backgammon_regeln.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_off0000c459.bin
159c85e402ca916a58d4eb29bb726f02013139d6b4868ab3c0ce73be44f5ccee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC459 5308 bytes
font_01_sfnt_off0000d662.bin
ffa2714ae17be2e2f6eb08338ac105a891ef286b285ba9b6c6a0c4f39841ad36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD662 10400 bytes

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