Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a45c09e1b9b751…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 01:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 646b9032c1ffdaa3d2ed286fead11513 SHA-1: 635217ebbbeb6bda2a1fc1c443f373c2c90a466c SHA-256: c4a45c09e1b9b751ce06af4c9a38fa806bb453d98e978c7ec73a55a6ec37a4f7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service. The primary heuristic indicates that these links are intended to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the primary redirector URL and a secondary URL hosted on Shopify, suggesting a link farm or redirection scheme designed to lead users to a malicious destination.

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.cc/pify?keyword=c+define+template+function+in+class
    • http://files.mountedup.com/uploads/1/3/1/6/131636719/8002577.pdf
    • http://files.mills-appeals.com/uploads/1/3/0/7/130738896/7181476.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/lulirasofak.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/83459596064.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/kogosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/gibiravizuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/gofuxomevapoxoke.pdf
    • https://cdn.shopify.com/s/files/1/0436/1283/1907/files/riturijawimojowogavodeda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/86623597577.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/nolewigamexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/cookbook_template_for_microsoft_word_2010.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/dupeke.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/90659788852.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/java_guessing_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/gexepigis.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_off00006577.bin
ba4b24715cab1f5fa31600dacdda726960ca96deccfd5baf8a0dccbd8b441d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 5108 bytes
font_01_sfnt_off000076ba.bin
ace0973b67a092ac6242ad1c072e0cf71793a50eed438e2dfe0da104760e44c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BA 14816 bytes

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