Malicious PDF — malware analysis report

Static analysis result for SHA-256 90be4be845309f23…

MALICIOUS

PDF

42.7 KB Created: 2020-08-26 01:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd5dd96f9aa5f5c3c7ed0274d3c9dda4 SHA-1: 34fdbd04013afed955b96f89963313542a0aa0dc SHA-256: 90be4be845309f23624921fb65063bd1d062a62e050efa9f98c557c124d74833
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate educational material, specifically a "cogat practice test" for kindergarten. This link redirects to malicious infrastructure at ttraff.ru, indicating a phishing or malware distribution attempt. The PDF structure and embedded links strongly suggest a malicious intent to redirect users to 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.ru/pify?keyword=cogat+practice+test+%2528kindergarten+an
    • http://files.shineonpro.com/uploads/1/3/1/4/131438330/bizobejogozikuzem.pdf
    • http://wamemugid.couleeregionfitness.com/uploads/1/3/2/6/132695384/rotenedixa.pdf
    • http://nikener.takakohasegawa.net/uploads/1/3/0/7/130776738/popebigetit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/hadoop_hive.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/43394324698.pdf
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/tame_impala_elephant_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/direct_tax_amendments_for_ay_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/wazowaraxugavizipupoxagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/caller_id_block_calls_texts_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/misulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5585/7315/files/85562301625.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/93401656832.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/knewton_alta_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c54.bin
d49122b2c212418be44d94b4e85e6b6b2fb0d165410e42059db15ce43200a742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C54 5160 bytes
font_01_sfnt_off00006dfd.bin
1e6da936f9d226d46e814d19b5c8e1b3799991549ac97cbba9a6fa701b96b6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFD 9956 bytes
font_02_sfnt_off00008fee.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 4324 bytes

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