Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f606f99d46c88d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-20 20:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 555a6b71b13e67b5be47405c1a55ea12 SHA-1: 04ef58219f6eb9755065242be50375f5978648cd SHA-256: e8f606f99d46c88d960042e9922b22ce549fd0fa9aa3e9ba1b59723cf025f773
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as information about a 'Hunter college physical therapy information session'. This URL is part of a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. The PDF was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

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.ru/pify?keyword=hunter+college+physical+therapy+information+session
    • http://files.turnerlaboratory.org/uploads/1/3/1/4/131453989/fatatag-pulakariv-labutu.pdf
    • http://romapotur.fusionenrichment.com/uploads/1/3/1/4/131406082/fuxiwikevupegigo.pdf
    • http://kiwopox.northenddeli.com/uploads/1/3/1/4/131438379/dujaki.pdf
    • http://jopodew.dulcineaquartet.com/uploads/1/3/1/4/131408071/31561b339bcad.pdf
    • http://kiwopox.northenddeli.com
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/anterior_tibial_tendonitis_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/32385036863.pdf
    • https://cdn.shopify.com/s/files/1/0440/7794/0886/files/19569520586.pdf
    • https://cdn.shopify.com/s/files/1/0433/4456/0281/files/rezuzidutasadogujumil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/mexagizifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/yield_curve_theories.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/sanomos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/hssc_declaration_form_annexure_e1.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5911/files/calendario_rusia_2020_hora_colombiana.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_off00006436.bin
1a233a2fcd57dffd2466867970b4b78bf94f8ceffc045b7a7fdfbb433669f673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 5492 bytes
font_01_sfnt_off000076c2.bin
95c0643beeb2de862401a5b31e619f733bc3b68fecef0435a9c1b736fa3b0c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C2 10616 bytes

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