Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7fefb342d8f1f2c…

MALICIOUS

PDF

36.6 KB Created: 2020-08-26 02:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54d888a75590331dfcacc6fe0161c719 SHA-1: 228aa3b65d62cd6069e2265ea95b128e18c90894 SHA-256: a7fefb342d8f1f2c9b3444aca5bcd25fa2aa76d0b4ff2cec0fbc61ca7345edd7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=dr+bhatia+medical+coaching+institute', is designed to lure victims by impersonating educational content. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious link is likely intended to redirect users to a compromised or malicious site.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=dr+bhatia+medical+coaching+institute
    • http://jogagumek.skilledpaint.com/uploads/1/3/1/0/131070894/jidebuzizeva.pdf
    • http://mutap.anerdinpearls.com/uploads/1/3/0/7/130776485/7217480.pdf
    • http://files.chennaishiayouth.com/uploads/1/3/0/7/130740589/joxax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/70550036822.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/all_taekwondo_black_belt_forms.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/premium_psd_website_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/zegovaredumobafogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2321/files/jomurok.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/learn_bisaya_language.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/suridowexubazofufek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/jijitolelasamam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/toyota_automatic_transmission_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/62874204798.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/dvt_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/4346/3074/files/78177469532.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_off00004fe9.bin
b8c8371fbe99569fbece1bfa3a80c6f1025759a491b3354a19a26cdafe8651f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE9 5492 bytes
font_01_sfnt_off0000626e.bin
ce8c704e9c01e33aaf2ea12cdf1dd427e629ff01dd880a4b389e30bed113037e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 10012 bytes

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