Malicious PDF — malware analysis report

Static analysis result for SHA-256 5738c488a7fc0e7e…

MALICIOUS

PDF

41.1 KB Created: 2020-09-16 16:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73cc281a12a78f94ed66fcefe9258864 SHA-1: dbbb80e620df146693efc94b92fb4b4d6ec5758b SHA-256: 5738c488a7fc0e7e1834d927ec9f0bedd92540e5e136306e418dce7b57b415a2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a mass of external links, many of which point to redirectors and potentially malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'crucible quotation worksheet answers'. This suggests a phishing or malware distribution attempt. The presence of numerous PDF links and a redirector link strongly indicates malicious intent.

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.link/wix?keyword=crucible+quotation+worksheet+answers
    • http://fuzudiz.pillagerboosterclub.com/uploads/1/3/0/8/130873830/dusobemat.pdf
    • http://files.savastanospizza.com/uploads/1/3/0/7/130775435/7b6b2b07c5.pdf
    • http://jakekawev.1beautifulyou.com/uploads/1/3/0/9/130969242/wisodora-puwezisaged.pdf
    • http://konopan.ultratech-electronics.com/uploads/1/3/1/4/131407158/gefefe.pdf
    • http://fixonajim.kristenlucasphoto.com/uploads/1/3/1/4/131454143/kesopilak_takujedamuv_nonutovukine_lakowisozejetam.pdf
    • https://a813a4ad-d838-43a9-95c5-7a4e9135dd59.filesusr.com/ugd/4d548e_4adc546d86484e2587feeb206c865b7f.pdf?index=true
    • https://226fecdb-746b-4ddb-9166-4a29292bd363.filesusr.com/ugd/b926a8_c703cb886a524a299f55dbc69258f1f6.pdf?index=true
    • https://1debdecb-234c-4bc1-aa67-f27b1e3513e4.filesusr.com/ugd/314c35_ef909cf116824215a7c15d742fa6f3e6.pdf?index=true
    • https://8b726498-925e-410f-97bb-fba0b6c6078e.filesusr.com/ugd/70e7d4_19268f7e5e3346268497302d9748b9fd.pdf?index=true
    • https://74f3db12-7bd5-4cbd-9f6e-80f808f209aa.filesusr.com/ugd/cc3ca9_4127ee1e46c54e878efaa54049b835e2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0486/2404/2149/files/wifakof.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/630442516.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/64133397632.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/29693765809.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/sevusiporubolegamefe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/gulejevekotukiruranevu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1747/8815/files/vejimowuxif.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_off00006266.bin
16a2bd60044571228aa494638ec2eb295e2605f6d6c0f368e0c2934929720ce9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 5212 bytes
font_01_sfnt_off0000742d.bin
d274bfabd7ae986faaf1eac0948f1bbdb906e047489b339dd5f170a00ffdbbad
pdf-font-stream PDF embedded font (sfnt) at offset 0x742D 10180 bytes