Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad5abfcf5a35579…

MALICIOUS

PDF

70.9 KB Created: 2020-08-13 09:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 637b24586d49c321ff1f847251a37610 SHA-1: 92e1dde1187f9abef1fb5e5303626f87df5789a0 SHA-256: cad5abfcf5a355795008104138b2d3383a7d9b210baea2666a9c2994c2a0d5da
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=dianetics%20libro%20pdf'. This indicates the document's primary purpose is to redirect users to malicious sites. Additionally, a heuristic for a PDF link farm was triggered, suggesting a broad attempt to distribute malicious links. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the 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.cc/wb?keyword=dianetics%20libro%20pdf
    • http://xekozulo.visitmurchison.nz/uploads/1/3/0/7/130739048/wexaguvode-senuzawasemafot-tunulif.pdf
    • http://files.everythingalcoholink.com/uploads/1/3/1/1/131164431/7627101.pdf
    • http://files.lomlibrary.org/uploads/1/3/0/9/130969600/6255389.pdf
    • http://wejorizud.buythef-ckingdip.com/uploads/1/3/0/8/130813714/vugolizesudes-getajukekeb-fuwob-fapokolurav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/fagap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/accounting_ratio_analysis_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/tubirugaxezojelon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/allahabad_high_court_aro_result.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/64073149380.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/vokewavuledo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/86527400937.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/23170884633.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/30580246842.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/converting_m4a_to_wav.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/carnegie_learning_algebra_2_textbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6e.bin
71430f8489e61bffe1e084c09cc3dc196412b0209997562cb613285ebf3c9738
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6E 5076 bytes
font_01_sfnt_off0000dca9.bin
e7993ec8d88f07ca981ee72fc1945c63e715bb893e8f6106c3df403fe660cb40
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 10468 bytes
font_02_sfnt_off00010044.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 4324 bytes