Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b4cc14b1d28c26…

MALICIOUS

PDF

41.2 KB Created: 2020-08-09 20:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afeac335a0d62320fecc866afc99ffe8 SHA-1: 66f2630048ddfa5e8d4da599de95e7b57c359648 SHA-256: f0b4cc14b1d28c26c7eb2d681b12385602cc39e0fc679116cf74fed11340c8f6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=logic+riddles+and+answers+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=logic+riddles+and+answers+pdf
    • http://files.redclayphotography.org/uploads/1/3/1/4/131409135/mufajiti.pdf
    • http://zedabumu.marchmontfarm.com/uploads/1/3/1/4/131483492/903602.pdf
    • http://files.fbcwayne.org/uploads/1/3/1/3/131398222/d16ec.pdf
    • http://files.the-chateaux.com/uploads/1/3/1/1/131164122/1281655.pdf
    • http://files.souliciouslifestyle.com/uploads/1/3/1/4/131406222/3636900.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/4704841998.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/vikivaragegizodo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/jonomovedukoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/vadaxewivuxemox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/hp_elitebook_8460p_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/clear_vrchat_cache.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/jukurobapafuxuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/sigma_aldrich_handbook_of_fine_chemicals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0430/6878/4791/files/lesuxupisozigip.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_off000063d9.bin
a5159adf76e6ed4cf3b548d9b3e0bfd4a346dcccb8a5e3baac72cdb337c12093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 5356 bytes
font_01_sfnt_off0000763b.bin
69fbc13ad20ff679f6a93f0167e799cc8bf0b85e4318b52e8e2a584a3fa3451a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 10012 bytes

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