Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dad519e731f7efe…

MALICIOUS

PDF

72.2 KB Created: 2020-08-18 14:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67d03bfea8bbea3a231275d496a63e37 SHA-1: c3902e8b4c1184aaccbb734780cfa8702ccbade3 SHA-256: 3dad519e731f7efea2bb1062f1679ad0b1d91744427a5db424d4de9ea990ba6b
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is used to lure users into downloading potentially malicious content. The document body, though heavily obfuscated, contains the same URL and a reference to 'Apache openoffice 4.1.2', suggesting a social engineering pretext. The presence of a link farm heuristic further indicates an attempt to distribute malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=apache+openoffice+4.+1+2
    • http://files.aforcapacity.org/uploads/1/3/0/8/130874400/7155143.pdf
    • http://fimepas.grmfinalportfolio.com/uploads/1/3/2/6/132695535/wajixugujoxaxanagog.pdf
    • http://files.wessworldwide.com/uploads/1/3/1/1/131164310/4689085.pdf
    • http://nadow.perfectionslandscape.com/uploads/1/3/1/4/131437604/6316497.pdf
    • http://files.fredswansonbooks.com/uploads/1/3/2/8/132815123/3852127.pdf
    • https://cdn.shopify.com/s/files/1/0432/5625/0525/files/34370441576.pdf
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/answering_interview_questions_on_confidentiality.pdf
    • https://cdn.shopify.com/s/files/1/0439/4939/2030/files/cross_multiplication_method_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/navasatifiwen.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/deliberao_arsesp_732.pdf
    • https://cdn.shopify.com/s/files/1/0451/2422/3141/files/prevention_of_occupational_hazards.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/47568557484.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/15891259229.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/1815068603.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_off0000dbe8.bin
3e3122e43cd4f6f94a8d5ee01df3f58a989aebfbb82e77c7c91385e036a4f32c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 5088 bytes
font_01_sfnt_off0000ed4a.bin
db3c24de621e2c428578b17ba2abe491803522930f4a30528c0b3e6a3337480b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 11504 bytes

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