Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b06ccaecfe0e80…

MALICIOUS

PDF

101.7 KB Created: 2020-08-16 12:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad2e0d160f977c1ae31e8cea04d87fb0 SHA-1: f5847dffffd975d982f2cac2f742b11f76f8a1a2 SHA-256: 37b06ccaecfe0e80d66267cf671cfaef35ef32400e9b9f589ce7da8b4b6ad522
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, many of which point to a redirector. The document body contains a URL that is also present in the heuristics, indicating a likely attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=lightning+returns+garbs+guide
    • http://dasumez.lifesacredelements.com/uploads/1/3/1/3/131379510/xenewogul_vuxemerepe.pdf
    • http://files.johsafetyconsultancy.com/uploads/1/3/1/4/131483138/695a84037cdf2.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/vutejiweni.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/manoditeresamemurekosapef.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/unicode_math_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/71288678362.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/lubawogamusatamejawuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/dosoweterorebemava.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/sq11_mini_camera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3355/files/ketogenic_diet_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/nsfw_subreddit_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/rukogijoguwibafakoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/childhood_bilingualism.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ce.bin
39b05232a83c6a547743a3d8005a9cd491b03c28ed181b0559ee9d8d89e8ee16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CE 31928 bytes
font_01_sfnt_off00012a56.bin
d39431c3c6cf12f73cac1657448cfa408f559907677128fb7ea60fe96abf50b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A56 4908 bytes
font_02_sfnt_off00013aef.bin
336bdb9d835dd417c45e4056d7b933b364ee53983c18e068df427062508ec7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEF 12940 bytes
font_03_sfnt_off000163fd.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163FD 16092 bytes
font_04_sfnt_off000178c3.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178C3 4324 bytes

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