Malicious PDF — malware analysis report

Static analysis result for SHA-256 22467f3b305ffa4a…

MALICIOUS

PDF

55.6 KB Created: 2020-08-06 04:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f0e69fd6cedbead1d0af2f96e4a528 SHA-1: 084251656df71a2548e28ff4cd17312bf321d4eb SHA-256: 22467f3b305ffa4afe56864aaea8c955527b9ec39b7f6a917800cf62ae60cdf2
128 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector service. Another critical heuristic identified a large PDF link farm, suggesting an attempt to obscure the true destination or distribute malicious content. The presence of a download button lure further supports a malicious intent, likely to trick the user into visiting a compromised site or downloading a payload.

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/pify?keyword=pasar+cade+simu+a+pdf
    • http://files.garybrowndesign.com.au/uploads/1/3/1/4/131482968/tisuwidozojoxis.pdf
    • http://lozala.thecroakingfrog.com/uploads/1/3/0/8/130874457/xalip_gipokorosopisuz_nunas.pdf
    • http://files.weswilkinsonplumbing.com/uploads/1/3/1/4/131438308/1bf8e.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/xeredimiser.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/48000657539.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/90884464167.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/taralubajosem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/63135224983.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/3438362723.pdf
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/fiwojufiwovolijaxodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/rapidex_english_speaking_course_book_in_bangla_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/82476179273.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/nugetimimafipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/9356104722.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5383/files/21179465395.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_off00009d9e.bin
dbbc701b2fdea08092e3a500f00d84288b571e812acb4afbb1fe220d305261b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9E 5272 bytes
font_01_sfnt_off0000af72.bin
5f912393387753163288241009e5557f90dc552202c3330bb00aa5bd309fa94b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF72 10168 bytes