Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0707faf9847d835…

MALICIOUS

PDF

34.8 KB Created: 2020-09-27 23:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03910d412da6826683bcf8e063628ac2 SHA-1: 8adb2fb7d0c37cbbd6d2663ebc6804e8867ed407 SHA-256: f0707faf9847d835dc13484a9285d8677db4a85ea6612faea61f9e134b3620c6
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, indicative of a link farm or SEO spam campaign. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect 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.cc/wb?keyword=anomia%20card%20game%20target
    • http://joxaxe.renewalcast.com/uploads/1/3/1/4/131406717/namoxerifonakadusazi.pdf
    • http://lubasa.roni-nikol.com/uploads/1/3/1/4/131453330/dawularekozedak_rozowev_xivufituzipas.pdf
    • http://files.meistertrees.com/uploads/1/3/0/7/130775352/940377.pdf
    • http://files.ukcpioneerdays.com/uploads/1/3/0/8/130814298/fubazirok.pdf
    • http://files.achslinkcrew.com/uploads/1/3/1/3/131381901/8b232a174d44.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/46458656876.pdf
    • https://cdn.shopify.com/s/files/1/0443/5096/3868/files/sobre_o_behaviorismo_skinner.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/primo_viaggio_4-35_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/64915070511.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/air_drying_lumber.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/wosof.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/divisibility_worksheets_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/xekofakaligubagisuredi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/25427475446.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/33557740197.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_off00004d29.bin
d972a374c6afe489c5de0a91a46953653fb2b66d2079d8efabad8f1f069fb9be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D29 5040 bytes
font_01_sfnt_off00005e2e.bin
196b8c2794bfdf6b7f9e1be2648e3dcf7cc9a37efa0a1a20fbd9dc3943d27dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 9480 bytes

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