Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a908e60d25b99de…

MALICIOUS

PDF

46.5 KB Created: 2020-07-28 20:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e67dcdd528bfb1d954175bdd01fe9db SHA-1: 0e6db7ba122b5a8b7f54c0888144624fae250097 SHA-256: 1a908e60d25b99dee7e2f473141ab6ec28033ecb6ec5d08815981d78e3907a41
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a date sheet for Kurukshetra University. The link points to 'ttraff.cc', which is known for redirecting to malicious sites. The document also contains a large number of external PDF links, many hosted on Shopify, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. The presence of a download button lure further supports a malicious intent.

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.cc/pify?keyword=kurukshetra+university+date+sheet
    • http://files.tomcatsseacadets.org/uploads/1/3/2/6/132682295/vubaluwex.pdf
    • http://files.joel-nichols.com/uploads/1/3/2/7/132712120/1372492.pdf
    • http://files.weirdobooks.com/uploads/1/3/2/6/132682684/zelevakagutumer_kawekebedozogal_xajilodomedigux.pdf
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdf
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/64325168600.pdf
    • https://cdn.shopify.com/s/files/1/0432/3812/9823/files/1109746977.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/57902995088.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53262414385.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/mijexedex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/85471134086.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/28200086565.pdf
    • https://cdn.shopify.com/s/files/1/0432/5012/2916/files/nabaveteletalabidetadugud.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/kowuzumenabupaluzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/fikanubizamiluxabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/22007135627.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/demopuperosanedozil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/fanurebotebon.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_off00007a0b.bin
31d0a311bdec4a8efccb04d840e9e708517c8ab241a9e518f1d0959e74c83eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 4848 bytes
font_01_sfnt_off00008a7c.bin
7f96a2ea07c5048363174d3b1c03280f5e294aaed4535076b2512b6a52f98bb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7C 10040 bytes