Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7fa060491b39cb…

MALICIOUS

PDF

32.9 KB Created: 2020-08-19 05:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3deb45247a3e87b9b56f7df154e4a7c SHA-1: b6ab19416572364a3faa9f77cc169657490e47f8 SHA-256: 9c7fa060491b39cb5621265fb25d06bc10fb6d5c69ca547c9a3f85ea71f36b53
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to a 'geometric sequence worksheet doc', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious IOC is the redirector URL.

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=geometric+sequence+worksheet+doc
    • http://zegag.pamelacalore.com/uploads/1/3/1/4/131407424/774d0597691.pdf
    • http://dofotuxi.inspiredturquoisetack.com/uploads/1/3/0/8/130814328/0aa301af07679f1.pdf
    • http://files.green-hopefoundation.com/uploads/1/3/1/3/131398555/zedugov.pdf
    • http://files.dancefirstllc.com/uploads/1/3/2/3/132302894/45d3b04701b648.pdf
    • https://cdn.shopify.com/s/files/1/0432/1932/0992/files/12951882992.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/13616459147.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/bizagi_manual_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/beats_solo_3_wireless_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/gujexezejevuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/35928889531.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/85089504935.pdf
    • https://cdn.shopify.com/s/files/1/0431/6433/6290/files/32515811089.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_off0000451a.bin
01ce231696e79c0c087c644097f899d605e88b890bbababd3052156e31f57616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x451A 5248 bytes
font_01_sfnt_off000056e1.bin
d3250cbd587046c4f3c03dacfd7c5767b571ef1c2511bacd812be27571d0371e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 9488 bytes

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