Malicious PDF — malware analysis report

Static analysis result for SHA-256 959bfb526c9ac45a…

MALICIOUS

PDF

66.1 KB Created: 2020-08-22 11:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c6399d0b7f9f72d63ba11910cb902e SHA-1: 36f8b7e59413fb1f2ef2eb35953db605fbc79ae6 SHA-256: 959bfb526c9ac45a4df894a692492ae84375b842f048227107036a25c11fba9f
128 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, contains text related to 'Executive summary example financial report', suggesting a lure. The presence of a link farm heuristic further indicates an attempt to distribute malicious content. The primary attack vector appears to be social engineering via a fake financial report to entice users to click the malicious link.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=executive+summary+example+financial+report
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdf
    • http://files.moanxiety.com/uploads/1/3/1/4/131437394/xorobudunile.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/riwevifulexudolozot.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/23843858125.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/14634988904.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/dimunukakufijusod.pdf
    • https://cdn.shopify.com/s/files/1/0437/3941/4677/files/sululorukizupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/watibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/posuteveduwimixupolifumij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/cbp_physics_config.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/nobefusivusogoka.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/89029976660.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_off0000bbea.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEA 2828 bytes
font_01_sfnt_off0000c5e4.bin
ee05569052aae36cb2ae3cbc4465dbe3c4dce9c4b489552967fed566bae18197		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E4 5348 bytes
font_02_sfnt_off0000d80c.bin
fe9f824de5444505da58f515e39ede6e96841c89367900261cbd86bf5858743a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 10240 bytes

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