Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f38b3ff9841c2a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 09:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f5ee9c5c150519c00bfe92d6587acff SHA-1: 44cfc3a385fb42f7fb91cd4f89eeb04d1ab92aab SHA-256: 86f38b3ff9841c2a6d64e9cdc6f33ae612bc977c22a0225c4382e88a99a2b637
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=pneumopathie+d%2527+inhalation+traitement+pdf', suggesting a lure related to medical treatment to entice clicks. The presence of a link farm and a malicious redirector strongly suggests an attempt to lead users to 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=pneumopathie+d%2527+inhalation+traitement+pdf
    • http://zufizob.eaglecharterschoolsalem.org/uploads/1/3/1/4/131454807/bafoluvijav_medonenu_relog.pdf
    • http://files.glazedfairport.com/uploads/1/3/1/1/131163846/3cacbd.pdf
    • http://files.lacaa.com/uploads/1/3/1/4/131437799/foxul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/22056937530.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/basic_computer_programming_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/geometry_g_reflections_worksheet_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/lixozazuwofuledu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/4704474430.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/54935668636.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/24728698529.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/94267939228.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/76406775215.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_off0000613d.bin
1f2b6bb65a03684806a2572a77d3ce5f89c9e0ce87b4ca84690fe2ec43418fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 5136 bytes
font_01_sfnt_off00007285.bin
ed29e5d9408e0b842909ecdfe4e5fa3dde0b571233f0fc0fe05be9d1bd0b1ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7285 10264 bytes

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