Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c76cee879325f2…

MALICIOUS

PDF

41.0 KB Created: 2020-08-17 02:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb35e668ed1d5534560c80f25a19bda8 SHA-1: ed25e4c65ba485e15e651ccd48e69ee1d89fec08 SHA-256: c1c76cee879325f23aaba769004e7669e7ba720922678835a2ae66f4b6327317
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, with one critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=2016+honda+civic+android+auto+update'. The document body, though heavily obfuscated, appears to contain references to this URL and other PDF files hosted on various domains. This suggests a link farm or redirection strategy to obscure the ultimate malicious destination.

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=2016+honda+civic+android+auto+update
    • http://files.robinkanstul.net/uploads/1/3/2/7/132740291/pabirif_nupifom.pdf
    • http://files.resiliencestudiesconsortium.com/uploads/1/3/1/8/131871907/447f15da9.pdf
    • http://files.wviolin.com/uploads/1/3/0/8/130814043/f25c3da78c0.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/39797373950.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/bunan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/aptitude_test_questions_and_answers_with_solutions_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2384/files/71680808199.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/44841515900.pdf
    • https://cdn.shopify.com/s/files/1/0436/8013/7369/files/kadarepupomeso.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/dofiladezurakodatinuxaba.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/dasiwigaxupuzowusul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/71147109775.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/67788403174.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/avadhuta_gita_kannada.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_off00006211.bin
710e8d0063221f68faa5e49a0886483458df1c61c820e2dfecaade0156290740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 5396 bytes
font_01_sfnt_off0000745a.bin
9a32ab9a267b658d753c8d2fdba693ef30d8f4a42d2bd9f1dab30e038073395d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 10088 bytes

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