Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01bba342315a0cd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 01:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e38df79bc369a56533f7ae50be386509 SHA-1: 75409ef5cb40b59eeb016e1c3f16cb369f4b535f SHA-256: e01bba342315a0cdd31cf0ebfe5fab8f70693686d6ce75f7979f2e0485989d6c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'marketing plan' and the malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=marketing+plan+for+online+travel+agency+pdf
    • http://gisimo.gethealthyinitiative.org/uploads/1/3/1/4/131437736/8bdee07ead1.pdf
    • http://files.camralsolutions.com/uploads/1/3/1/4/131454172/gosalebobasiwasolo.pdf
    • http://files.borderdentalstudygroup.org/uploads/1/3/1/4/131413905/tewut-faxeri-zusexawaguv-pesamofoguperet.pdf
    • http://files.bowerslab.org/uploads/1/3/0/8/130813966/vigakolaw-wisewapojofur-vitotasaji-detixedemilajep.pdf
    • http://files.overheadcranesair.com/uploads/1/3/1/6/131637224/6603662.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/absalom_absalom_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/71932719248.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/fraktur_acetabulum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/64529451902.pdf
    • https://cdn.shopify.com/s/files/1/0439/7917/8142/files/yamaha_clavinova_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/puvalakegulalov.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/fuzesaremepiteb.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/bopilesumiwiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/84569822148.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/pevoxejuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/wuvesopegutelonuduwepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.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_off00006569.bin
7ab4e3c6e37548a812571d8f4a322b5641405782f5b7b8a5bf51049e9b70c45c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 5376 bytes
font_01_sfnt_off000077eb.bin
0fc978bde4c8c3e22dc4f4c7b05d46bca47e2734fddc527ebb1eaff18a112e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10156 bytes

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