Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f99845084fb9ab…

MALICIOUS

PDF

38.4 KB Created: 2020-08-21 02:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa71df68b1c8eefb8b0020ecf0f190f SHA-1: 1eba7d52fd5c8185867f6edf1c5c06efa7eb14b5 SHA-256: 47f99845084fb9ab89dbb8fa9bcf1061ba712cc0c941a5b1675c72dc89f6f0aa
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'engineering calculation paper template' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a visual download button heuristic further supports this social engineering tactic. No scripts were extracted from this sample.

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/pify?keyword=engineering+calculation+paper+template
    • http://files.montaukmist.com/uploads/1/3/1/0/131070212/266638.pdf
    • http://kemiboso.keepcalmandreadon.org/uploads/1/3/1/4/131405927/famajuzapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/ngritude_et_humanisme.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/24421992976.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/tabla_alfabeto_griego.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/tudiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/creative_approaches_to_problem_solving_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/sawijuvasomatatebik.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/bursary_application_forms_for_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/41018940810.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/ribepixozit.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/30148743080.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/xezibukajigofagakuvola.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_off00005954.bin
2276438dfcc1686ec4be9c39848699e31d1f9a435535e5b947c3bee2920dc9be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5954 5032 bytes
font_01_sfnt_off00006a5b.bin
bf4efdde53d755221d6d6af97e27619fdcc81686d9c786a365adb950f3ff89b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5B 10128 bytes

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