Malicious PDF — malware analysis report

Static analysis result for SHA-256 28aa32f38884834a…

MALICIOUS

PDF

51.3 KB Created: 2020-07-28 22:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1bb8dabbd9abe6766dbc54b61f8161 SHA-1: fc95be1171f19449cb0c6c19e744cd9c01293ca0 SHA-256: 28aa32f38884834a652cc044bbf6660836077977316de70c7992bb0a3b0d1627
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Clash of Clans online generator apk', reinforcing the lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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.ru/pify?keyword=clash+of+clans+online+generator+apk
    • http://files.lisammartino.com/uploads/1/3/1/8/131871535/rafoxokagin_kigiru_wimebukagata.pdf
    • http://files.kyleyatesphoto.com/uploads/1/3/2/6/132681901/zubunage-fugejazawosuk-bofezo-nosakuzubadofam.pdf
    • http://files.colleenshaunawaters.com/uploads/1/3/1/1/131163684/eb9bd4b4.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/rumemunulezabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/77238628899.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/xekuzipodiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/javukutikuwuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/xesilakatamamunagopizip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/sigoti.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/70923985640.pdf
    • https://cdn.shopify.com/s/files/1/0433/8650/3326/files/kozuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/67570615069.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/kunatezare.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/313104749.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/wotisodaposanivotosepube.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_off00008973.bin
5adac05bdc42c6b5187304ff758108d734219b896abdcd00e9247e6b3817959f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8973 5152 bytes
font_01_sfnt_off00009af2.bin
44196c43123aaf060d7c08015680e2dd9d2b9331dd7283bf43eff81d24a59c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF2 11008 bytes

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