Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b498bf68a591d9c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 02:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04040a6a5688436a6bf22c2f270efcbc SHA-1: f973bb1b355a0f8c305dcc33b5aced0cbbc9fb0a SHA-256: 2b498bf68a591d9c303277bc8fd25e6fdeabf7cf34dc449237b05b6044de163b
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL. This suggests the PDF is designed to lure users into clicking malicious links, likely for phishing or malware delivery.

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.ru/pify?keyword=baseboards+for+model+railways+pdf
    • http://files.siblingharmony.com/uploads/1/3/0/7/130776366/vawomadulepof_morofigojibumi_jotirer_simebubifu.pdf
    • http://tosipi.momentsbyannephotography.com/uploads/1/3/2/6/132695325/kijekelupevo.pdf
    • http://piran.whitecubepicturelab.com/uploads/1/3/2/3/132302956/fugepa-jisepe-fuzixebamadere.pdf
    • http://files.shelburneprimrose.com/uploads/1/3/1/4/131406758/fobitozijeneba.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/50469705275.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/kerelerijozepinugexov.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/alphabetical_order_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1730/files/vevunudipipipawirewepemax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/jivotomomowula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/85010002524.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/zakobutopame.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4459/files/29294254285.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5039/files/6625031907.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/32274541296.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_off000060e9.bin
86429159ee7c74a848211ec7cfe0e051c585d808cfbe561c69a367f525530f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 5568 bytes
font_01_sfnt_off000073cb.bin
7ede8f116e65844ce0df8c5d26bcacf072beb73989d7d1c39c004b988b05e9b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 10096 bytes

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