Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db990adcb849b34…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 18:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cd9c01516ff85d8154eca2f1ccd3d9e SHA-1: 763fb04dcba4ad7e51b6202832abc303fc362678 SHA-256: 5db990adcb849b345d660be2abe2413d5a28ce8cc85b18ee01eac2014001f167
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, masquerading as a document about 'white christmas chords pdf'. One of the primary links, https://ttraff.ru/pify?keyword=white+christmas+chords+pdf, is identified as a malicious redirector. The document's structure and the presence of many outbound links suggest a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF's nature points to a social engineering lure.

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=white+christmas+chords+pdf
    • http://kojezopa.jorusin.com/uploads/1/3/0/7/130739024/82ec82ac66.pdf
    • http://files.audrey4care.org/uploads/1/3/2/6/132695651/dubezudemados.pdf
    • http://files.pulse-studios.co.uk/uploads/1/3/0/7/130738984/vabofozisoronanibi.pdf
    • http://files.destyinvestments.com/uploads/1/3/2/6/132683087/5983337.pdf
    • http://files.quintemozartfestival.ca/uploads/1/3/1/3/131398143/6162566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/81189166072.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/xinevojarixaxabojupebesod.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/karaneweze.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/54998797381.pdf
    • https://cdn.shopify.com/s/files/1/0431/5948/6626/files/how_to_write_motivation_letter_for_scholarship.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/69086176898.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/giluzujuvex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3726/8900/files/periodontologia_clinica_carranza_9_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/cfa_level_1_mock_exam_2014.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/42292084400.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055bd.bin
fc6d303f66156ef650600f4ad51a36b5ba677976efb56d1d51ce3bf5068b84dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BD 5060 bytes
font_01_sfnt_off000066f6.bin
44fffe8a3bac3cc6505728de04f6eb281f19d5ee00d0daa3f6ac9125fc52a839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 10008 bytes
font_02_sfnt_off0000890e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890E 4324 bytes

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