Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d0f8dcc3993cd2…

MALICIOUS

PDF

41.4 KB Created: 2020-08-04 06:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82da51851353db378b676bd9d5e7160c SHA-1: ae3efa1fbbd96f0d219066fd3a8d3de9c8bc25ca SHA-256: 42d0f8dcc3993cd2bcf114dea10c98603b18a407bc8c6a4635fea74faaf5f351
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link is designed to lead users to potentially harmful content, masquerading as aptitude test papers. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting a broad distribution attempt. No scripts were extracted from this sample.

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.cc/pify?keyword=aptitude+test+papers+pdf
    • http://files.uptomogood.com/uploads/1/3/0/8/130874109/safiwefaw-xalop-xobapekavezi-laxabofesowoxuv.pdf
    • http://files.gangneungtours.com/uploads/1/3/2/7/132710759/wotagemijano.pdf
    • http://ruzura.universityplacewallc.com/uploads/1/3/1/6/131606069/jakuzopo_nabuninezevuxi_satok.pdf
    • http://files.beatwood.eu/uploads/1/3/2/7/132740730/433fb52b1834.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/vonuvulavelib.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/guzowuwaperesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/5023616841.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/balance_of_payment_adjustment.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/31104145516.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/dagupavaban.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/53784918715.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/muvasusafako.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/duwogunazumiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/5829585868.pdf
    • https://cdn.shopify.com/s/files/1/0438/2513/5776/files/tupaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/39054202314.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/85042385153.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_off000061e4.bin
d4136171cf9b2f67ccdda59426a9a007697fc560cd16af1dee7bd74397fcd2bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 4992 bytes
font_01_sfnt_off000072ef.bin
ac386801ff9faec56774c75a0297a342ce90e30f05d6d360ee778c7f0bd058bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 11676 bytes

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