Malicious PDF — malware analysis report

Static analysis result for SHA-256 1870ae55cdc8a3ea…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 09:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfda39e5b15dd05a6c6b5ca3ab0e46df SHA-1: edcd66ef34b3ff742ea6a2e1a9fa7c341171dcfb SHA-256: 1870ae55cdc8a3ea88f9126cef5d77a33c144f2463a853aac68ab05029c3b1f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ever+after+high+soundtrack', which is also flagged as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ever+after+high+soundtrack
    • http://tijixul.kerrycaffynart.com/uploads/1/3/1/4/131408024/xunemebuz-xaxitelaponap-vivedokafenilip-xirad.pdf
    • http://todupagat.faithfulacresnewfs.com/uploads/1/3/1/3/131398186/badadolo_rurezida.pdf
    • http://files.worthmoreministries.com/uploads/1/3/1/6/131607075/6541347.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/1093/0341/files/15873887713.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/difference_between_merger_and_acquisition_and_joint_venture.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/cal_poly_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/fefinebafonidukexotafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1145/files/answers_to_the_impossible_quiz_app.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3921/files/15582020838.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/bootstrap_responsive_banner_slider_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/wopejuredixoraronipa.pdf
    • https://cdn.shopify.com/s/files/1/0460/1102/3519/files/branding_guidelines_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4204/files/3936208341.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6191/files/25241559242.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/airbrush_apk_premium_gratis.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b6.bin
cbe1dbb001e41494d78b050d8714a8e406e992025e2094106788f87ed3e1fb98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B6 5332 bytes
font_01_sfnt_off00007adb.bin
2924e5f5d41995d4cf1bc5e6511a245d87ebf39531b2fe0e9b424377ebce0e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADB 9904 bytes

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