Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d3b661e48e2968…

MALICIOUS

PDF

40.5 KB Created: 2020-07-31 17:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52a7a551f055f4c1da3222b5a93bf16 SHA-1: 9aed1aa7008d065ffe411ea29366f9586943d697 SHA-256: 25d3b661e48e2968f688eb35216a52332cc425a5c2ad445f259a818199b30656
168 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, pointing to ttraff.com. It also contains a large number of embedded links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' lure and a 'password-protected archive' lure further supports a social engineering attack. The primary malicious URL is https://ttraff.com/pify?keyword=aashto+7th+edition+pdf, which likely serves as the initial entry point for a further payload.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=aashto+7th+edition+pdf
    • http://files.pediatricwellness2019.com/uploads/1/3/1/8/131856491/45f61087.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.northernilangus.org/uploads/1/3/0/8/130814432/zubemazafur.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/gekesovijotuxafi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/romizaximabaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/napabonefipuvalapewefigek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3040/files/zegogibito.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/82606920390.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/5718540634.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/2057023009.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/warenesipoxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2313/files/98093868907.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/72739306975.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/gesaronazobipafuvomuzobo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/zeguzopavofudirazunufej.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/86542410065.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_off00006206.bin
b2b17dca4cb4386ad0054ff47b3276bae08bbe970470431d1ae2ad827aa7b9fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 5068 bytes
font_01_sfnt_off0000734f.bin
b92abcbc5cce167ddd4bddbe8bfe734072c2a21623ae2d297fb39a7601cb7ba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 10012 bytes