Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd21c690c372c2a…

MALICIOUS

PDF

46.9 KB Created: 2020-08-18 16:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a911991e4589ac5e235fc8a9a0cf3d58 SHA-1: e42c6fdc6e320bf27432ba4194e634291dc304cc SHA-256: cbd21c690c372c2aaff9ed6724ebb41512c24fa511ddf828945603628bad22a8
150 Risk Score

Malware Insights

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

This PDF file contains a mass of external links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, indicating the primary intent is to lure the user to this malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to increase the visibility of the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=characteristics+of+computer+generations+pdf
    • http://files.hpcpet.com/uploads/1/3/1/8/131858044/8828378.pdf
    • http://ravus.seendparishplan.org/uploads/1/3/1/4/131453060/a17120a3013.pdf
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/historical_geology_lab_manual_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/82483011388.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/58703975770.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/ponefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/lodegusikixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/41599275451.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/53830714577.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/65409189012.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/adobe_indesign_cs6_full_crack_sinhvienit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/guwinedegasavox.pdf
    • https://www.cancer.gov/coronavirus
    • 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_off000069b8.bin
2517124b9a4b95b94c88a7dec152862ece6e764a470a53f151db4a72b33d30d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5440 bytes
font_01_sfnt_off00007c13.bin
5ca5f62928e4d06fa8f8e81f6c06abb5e8bfdfd9a1b9abacac74d776525e7626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 10808 bytes
font_02_sfnt_off0000a0c1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C1 4324 bytes

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