Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecf3275303d85ef…

MALICIOUS

PDF

37.5 KB Created: 2020-09-12 14:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c52068a5aff390e11cd50e885566e6 SHA-1: 85b5868ee0a065d957cc59b2a15b33472cd8245c SHA-256: 9ecf3275303d85ef303f3f8ced01483d62e451c2bd2aa0d973d16f4941290d74
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.club/pify?keyword=fundamental+of+mathematical+statistics+4th+edition+pdf', is designed to lure users with a seemingly legitimate book title. While no scripts were extracted, the PDF structure and embedded links strongly suggest a social engineering attack aiming to redirect users to malicious content.

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.club/pify?keyword=fundamental+of+mathematical+statistics+4th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0438/3929/1554/files/zofajofenef.pdf
    • https://cdn.shopify.com/s/files/1/0435/1701/8267/files/polaris_800_sportsmen.pdf
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/9133535596.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/nexetifu.pdf
    • https://static.usrfiles.com/ugd/8b61cf_4ef955179e524a34b0aeebf9c9dffad4.pdf
    • https://static.usrfiles.com/ugd/957c7b_d6edb39b0ce54f999023cd8a34449adc.pdf
    • https://static.usrfiles.com/ugd/eed56f_5f99f6fe79984385bc699c528c4ef4a1.pdf
    • https://static.usrfiles.com/ugd/d2759c_b105a4f6262b4065af2090f5f7219968.pdf
    • https://static.usrfiles.com/ugd/23a6c3_bd63b6f3ad0941df84d7039d8880ad3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_65e00add5f7e4f819b732a07367ea238.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/vutoduzexobidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/balewadi_bus_songs.pdf
    • https://cdn.shopify.com/s/files/1/0435/4696/8215/files/84355627970.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_off00005503.bin
509e56f69df583efe1bed07800e64d9e016c93b322139474ecd5572ca577fd1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5503 5344 bytes
font_01_sfnt_off00006718.bin
44d0ad65e4b3d799625f1f21ebd376a841575887969c2a875c4bf393b6913038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 9908 bytes

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