Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d277cff641e6cb…

MALICIOUS

PDF

34.3 KB Created: 2020-08-06 05:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eacd27e8f4ad3e19708312b323e7713 SHA-1: 08c6d34faf9e56b5fafec1b7c472b024bb4f2009 SHA-256: 23d277cff641e6cbcd233f78d678928fe670ce5420e618cbe5941e81f301bb34
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body also contains this URL, presented as a search result for a textbook. This indicates a social engineering lure to trick users into clicking the malicious link. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host further 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.com/pify?keyword=short+textbook+of+anaesthesia+ajay+yadav+pdf+download
    • http://files.ketg.org/uploads/1/3/1/6/131637257/vovazulufefugik_nugumujuwuzem.pdf
    • http://pujamubu.philadelphiamft.com/uploads/1/3/0/7/130740178/notudamadusomi_fofudijuvux_lukaluvon.pdf
    • http://files.countryanglers.com/uploads/1/3/1/4/131405951/6120844.pdf
    • http://files.aliceandhenrynaturals.com/uploads/1/3/1/4/131408256/8618153.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/wijiva.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/mezigasimusexifutezumasu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/24014258576.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/19902566169.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4387/files/83770798375.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/pixiv_id_82156.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/20045988743.pdf
    • https://cdn.shopify.com/s/files/1/0432/3642/5883/files/jitijug.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/20019387519.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/milani.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/putefato.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_off000045f5.bin
519aa43d307a427bd138419242c912f63d4a574b14a55d913c441b303da038d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45F5 5832 bytes
font_01_sfnt_off000059e7.bin
215fe98748ab9762a30e3c4b741c40643f5aa3e23e1ea8c5342cba5bba593d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E7 9484 bytes

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