Malicious PDF — malware analysis report

Static analysis result for SHA-256 d411161fdabeeb61…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 03:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b290feb31a2b01d2576f263bfd758c4 SHA-1: 8fc1c7e749a7485295c4ba5b7c8604cdf3f5460b SHA-256: d411161fdabeeb610aee1815ca447c1e17756126bd9e0cbf167e1b3633370dfa
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of this lure. The presence of a 'download button' heuristic further supports the social engineering aspect. The primary malicious URL is https://ttraff.cc/pify?keyword=chrome+software+reporter+tool+disk+usage, which likely leads to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chrome+software+reporter+tool+disk+usage
    • http://files.poppyavenueboutique.com/uploads/1/3/1/0/131070178/wuwapimej_garajabiwinizot_xafenefejir_gozubumaliraf.pdf
    • http://files.byraephotography.com/uploads/1/3/2/6/132681392/pizesojabenubipul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/xerenikopinanakijasoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fikikotiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/dodenegujet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/66263180111.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/12330607476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jegatakufiritejat.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/nepuwega.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5367/files/86122443285.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/bee_swarming.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4713/files/hypertensive_emergency_guidelines_jnc_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.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_off00006413.bin
833dcf1398372f209340357eeea584fd8072189ff9949f12e3afe3302f317b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6413 5516 bytes
font_01_sfnt_off000076c2.bin
efc7cd6a1b90b5f02f548a392bd7b7a47695dc9dd3aa0c0fc82a0933f233cde5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C2 10304 bytes

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