Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ba96d2bf9ae298…

MALICIOUS

PDF

53.0 KB Created: 2020-08-07 21:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e05386e26ca98f083133b3e6f979d05 SHA-1: 65b77a9af59499c220e96b6d792e1ee613fde22d SHA-256: 39ba96d2bf9ae298cf0bf941f8098ed59e0b5de2b5edbc325d028b2bcfb18555
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, reinforcing the attack pattern. No scripts were extracted from this sample.

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.com/pify?keyword=journal+el+khabar+pdf+22+avril+2020
    • http://majajejek.nccsdclearinghouse.org/uploads/1/3/0/7/130775868/fataruf.pdf
    • http://jajenudi.seamensexology.com/uploads/1/3/1/6/131606407/bovowadarafofeg.pdf
    • http://files.centenarychristiankindergarten.org/uploads/1/3/0/7/130776661/zuvekiwavesakuk_wobatevuwewudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/28615285691.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/26468504867.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/radupapoxazejixiborepaful.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/zolirupepisedalijuribo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifadek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/nijinediza.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/46104157909.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/4284012909.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/vefosusimetadutimadekuju.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/
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fca.bin
078b2a3c90e5ccf71ed33eeb71472bf98e3e1201d774d04e943afeabad0b048d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCA 5480 bytes
font_01_sfnt_off0000a26a.bin
d7eb3267afce710efb767b2b2382f44fc743a6921d168f38f373938afd635199		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA26A 11088 bytes

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