Malicious PDF — malware analysis report

Static analysis result for SHA-256 f447457138a7abd5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 12:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d67dcb31fd1b101e3b9156c86c18c22 SHA-1: 335893061cbab35a68c4acdbf6d0b2fe92c2b7d2 SHA-256: f447457138a7abd533a0880fa69a823c0b54b399b900223350c3d6b195c7cf11
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that align with a link farm or phishing lure. The heuristic firings indicate the PDF is designed to link to malicious infrastructure and potentially act as a callback lure, suggesting an attempt to direct the user to a harmful site or engage them in a scam.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=pferd+cs-x+chain+sharp+filing+guide+-+13%25252F64
    • https://static.usrfiles.com/ugd/b8c837_b2cef5258e2f4b43b3ac8039376843e3.pdf
    • https://static.usrfiles.com/ugd/4b7290_f7363417a2da4b0ea961b873f3dfb040.pdf
    • https://static.usrfiles.com/ugd/b77b08_e5d8209c5485412582785f61d2da18ea.pdf
    • https://cdn.shopify.com/s/files/1/0449/7784/8488/files/bank_accounting_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/lebeduxanoduludosalanus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/tmft_36_skf_price.pdf
    • https://static.usrfiles.com/ugd/93971e_908be615ee0a489f957d31f57e29df3b.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_04a811a02698470ca25ebd510f4cc9b4.pdf
    • https://static.usrfiles.com/ugd/eb4c03_f628acc41ece45cab9c5f8d68d739003.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_off00005ef6.bin
a40286f12576f6b4c5a68cac201575f3cdd20b8d1a3e102324fdaa5f5aa517de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF6 6012 bytes
font_01_sfnt_off00007380.bin
41114f3445d8887198c4c0c501d43c8e1a7f600850ab16b074e9c50f9c132046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 11408 bytes

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