Malicious PDF — malware analysis report

Static analysis result for SHA-256 2785c9ae8a2faf65…

MALICIOUS

PDF

38.9 KB Created: 2020-08-14 06:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5bcb754d78d667aa8e607d63cfd7d58 SHA-1: 6601ddb14971e1b2dd5413cbec898ecd43df73e8 SHA-256: 2785c9ae8a2faf6591a31f0e00aeb5db7992104902acd06790492ae92021c7e4
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. Additionally, it exhibits a PDF SEO link farm behavior, embedding numerous external links, many of which are hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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/wb?keyword=computer%20graphics%20and%20multimedia%20pdf%20notes
    • http://files.anytimeautoparts.ca/uploads/1/3/0/7/130775758/ff36e.pdf
    • http://fokut.cynthiagauthier.com/uploads/1/3/1/3/131384169/43f4d6.pdf
    • http://tirir.shoultesparkhoa.com/uploads/1/3/0/7/130776433/510401.pdf
    • http://files.revebureau.com/uploads/1/3/0/7/130738616/pifixezolo-kimulel.pdf
    • http://files.dixbaines.com/uploads/1/3/0/7/130775977/kelazulivaxixam_rumowakusexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/aviation_weather_jeppesen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/15030056979.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/wixeduxesebefixasabinidod.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/26164254069.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/jefemadasifixijebevujamew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/salutazulovumomiwerat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/85517306069.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/36647240504.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/67256100121.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/jufobopekuv.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_off00005887.bin
7db3b42e046b279b023f72367311f3f66490deb3be90d4786e92dfced4c02e4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 5476 bytes
font_01_sfnt_off00006b00.bin
eb3cc8800ad993a5befaeafe69f0fff5b73188237e5d3ebec2c85b7902def3f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 10436 bytes