Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a8ad24a842baa3…

MALICIOUS

PDF

51.4 KB Created: 2020-08-28 07:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64f3f6e17f7c5c6b893e00311e62d42 SHA-1: fb10ce301acb232bb72dad1ba101e9d7ffb8a760 SHA-256: d2a8ad24a842baa3e09234520d603f2dedb0336ed9c687f82a1032721fcdfa85
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to potentially malicious domains. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=ddo+warlock+build+2018', which is a known malicious redirector. The document body text, though heavily obfuscated, contains this URL, suggesting it is the intended lure. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=ddo+warlock+build+2018
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • http://files.tritongymwear.com/uploads/1/3/1/4/131407802/3d85aeb9809.pdf
    • http://tidupiru.prudhoelocalhistory.com/uploads/1/3/2/7/132740541/9674050.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/jomudom.pdf
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/bksb_initial_assessment_maths_answers_level_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/50053915351.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/91036553292.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/disk_write_error_steam.pdf
    • https://cdn.shopify.com/s/files/1/0461/9691/6374/files/methods_in_behavioral_research_12th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/65320350379.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/tiwugowurilene.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/kolkata_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/jumewetegidaferubudexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3335/files/zaranotitelofikotexaraxiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/70547400554.pdf
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/34454403878.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_off00008ae4.bin
cef5a466ec372051fad07eb1feeb8e745fa588a485f015c5070f4150aa9b7f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE4 5572 bytes
font_01_sfnt_off00009e0a.bin
149501233f7e1a3fd178d3261e2d5eec911dbadbb4c35b6c05cc9f9c050828cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0A 10088 bytes

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