Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06e849554089e8f…

MALICIOUS

PDF

46.0 KB Created: 2020-08-15 07:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5bf1c6b05a92a7605527ace03ce1b10 SHA-1: 3266d58b35410f1ddde7fda26bf3eaab0ebdd0ac SHA-256: c06e849554089e8f140df721a43435dc8108fb07a7215e1d1d84aa5197cc4dfd
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic identifying a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the URL 'https://ttraff.ru/pify?keyword=banner+background+photo', which is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious content through a chain of redirects.

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=banner+background+photo
    • http://files.buildlikeabird.com/uploads/1/3/1/0/131070618/ruwefu_xuxozonapixor_vuvipede.pdf
    • http://files.sterlingreputationspr.com/uploads/1/3/2/7/132740804/mazaribil.pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/rapd_pcr_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/english_grammar_beginner_level.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/abzurdah_completo_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/dewoxadawane.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/46105818980.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/nuwibamotiluzinul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/soxarulakapudisobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2027/8171/files/getozufiwupixag.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/ms_excel_vlookup_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0449/4350/7615/files/apspdcl_ae_notification_2014.pdf
    • https://cdn.shopify.com/s/files/1/0455/6845/8917/files/oracle_business_intelligence_enterprise_edition_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/juzufajafebofox.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_off000076da.bin
af3df34dcab67fc818433130a100bce47c4c72a741581ceab2203ab1b820dec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 5376 bytes
font_01_sfnt_off00008917.bin
30b98b72482a1879e70a182018287e9fd14838d272e7079d25fe0fd8972b00d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8917 10020 bytes

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