Malicious PDF — malware analysis report

Static analysis result for SHA-256 5783c2356ae1749b…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 19:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3b229938223894335b79fbadc6eadee SHA-1: d827a42ca1630099132bdcca255224757c92d06b SHA-256: 5783c2356ae1749b4ee83458d25144e86940af5409dc1f86cd4ac15d47ace778
158 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, contains text referencing 'Vidmate app old version 2014' and the malicious URL. The primary attack vector appears to be a social engineering lure directing users to a malicious site via the provided link, likely for further exploitation or malware delivery. The ML classifier also strongly indicated maliciousness.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=vidmate+app+old+version++2014
    • http://files.wildgears.com/uploads/1/3/1/0/131070590/3241289.pdf
    • http://pitagaziv.jamcolpromotionalproducts.net/uploads/1/3/1/4/131483167/vutizobige.pdf
    • https://cdn.shopify.com/s/files/1/0466/5924/0101/files/guzexadurodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/trusteer_rapport_for_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/60053927730.pdf
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/social_media_addiction_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/juvutijat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/vernier_caliper_sinhala.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/luwapebegixabijinaxej.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/mechanical_engineering_drawing_symbols_free_download.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_off00005e0d.bin
b332ef5f4de91b310724eff25eb3a5b920086993503f39c928fde5ce4c0c2369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 5332 bytes
font_01_sfnt_off0000701a.bin
dde1edc8a5b30cd942d29443714f80f549b41eb67c56e4c410bbf1632c05996a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701A 9904 bytes
font_02_sfnt_off00009166.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9166 4324 bytes

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