Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c22718ca4ba86d…

MALICIOUS

PDF

41.4 KB Created: 2020-09-02 00:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac7abe2343667d571201d942b988b1c SHA-1: d70895ac71561c1c0b1ba2b130fc00fb49d4a153 SHA-256: 52c22718ca4ba86d8089b80bbfb6b923093900ab8c0e569c37c6ab2d137136ef
130 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=class+8+science+chapter+11+answers'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0435/3500/7893/files/furniture_interior_design_software_free.pdf' being the first identified. The document body also contains the malicious URL and a call-to-action phrase, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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.com/wix?keyword=class+8+science+chapter+11+answers
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/furniture_interior_design_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/materi_sistem_bilangan_real.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/polyploidy_and_aneuploidy.pdf
    • https://cdn.shopify.com/s/files/1/0456/5270/5447/files/fawukuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/senudulorigefizoruf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/costco_return_policy_without_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/53748714651.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/84347173976.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/xitalurinoxamigilex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/9266175548.pdf
    • https://static.usrfiles.com/ugd/bd5c68_da993c15cecd4b62980ef675c3d4463f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0a240b999dd4962a9aaa97d70bbd310.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_off00006480.bin
02f8695c62edf33794dece494d0e2d6028d38cf20a647ec30bfede2410890d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 5264 bytes
font_01_sfnt_off00007673.bin
65ee49e7407168597b1423a08bb29743349ecb3e88c2af6fe63ea0bc8779aa8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 10060 bytes

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