Malicious PDF — malware analysis report

Static analysis result for SHA-256 21098ae750037df2…

MALICIOUS

PDF

46.3 KB Created: 2020-08-19 17:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37f20723354031b7b8f22fff9f07142 SHA-1: 7c59c1297af32233935c775da2d187912feacf58 SHA-256: 21098ae750037df263878d4779a973ca896a8afaeb30e62887b00772abdc2613
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Bellevue college registration forms' and the malicious URL, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a malicious link embedded within the PDF, designed to redirect users to a potentially harmful site.

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.ru/pify?keyword=bellevue+college+registration+forms
    • http://tipijikog.relapse-after-hsct.com/uploads/1/3/0/8/130813650/logolim-kevalekamido-navafirefigu.pdf
    • http://jivofuxu.kappagammachi.com/uploads/1/3/1/8/131856726/60e6dac8754.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/geparudufexesaxetowutig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0487/0305/files/acrobat_pro_dc_features.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/malayalam_devotional_songs_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53681635306.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/9758365007.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/intelligence_bureau_exam_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0135/files/fogepibufob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/budipanutunibid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/kaththi_tamil_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9462/files/94110467229.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_off00007661.bin
3eadd4f8ae470a2eb0ee70412b8b142c958a0698805460654bad7e83822abe08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 5308 bytes
font_01_sfnt_off00008865.bin
280eae69a6b14e4113886a3ccb7a6f0e5d5df12d884076ccb0167400ae992551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8865 10520 bytes

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