Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbd2b1558393e03…

MALICIOUS

PDF

48.1 KB Created: 2020-08-25 04:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51402df90c0cb4fb5517a4e3d2dd4d70 SHA-1: cd6306f19f9db1aaf1407947bbdac366190f71ac SHA-256: 7dbd2b1558393e031508214f80f585feb4e78be9574057bb140a6408d1c9b33b
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Template expense claim form' and the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or distribution mechanism. The primary malicious URL identified is https://ttraff.cc/pify?keyword=template+expense+claim+form.

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=template+expense+claim+form
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdf
    • http://nunoba.fcsirocco.org/uploads/1/3/0/7/130775853/cd071fa1b3.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/clinical_chemistry_bishop.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/37066664761.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/artificial_intelligence_and_the_future_of_warfare.pdf
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/jolat.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/dobotudaletuxudak.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/6839747312.pdf
    • https://cdn.shopify.com/s/files/1/0450/6550/2872/files/acuerdos_de_paz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/goxikinopenimene.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/computer_science_for_competitive_exams.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e86.bin
5e958bd01f16c341520a54c6171de60e184b7995bc67a991d86c02750f6159d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E86 5176 bytes
font_01_sfnt_off0000800d.bin
73f1eeb0aa8d68c88362750f075e5b3302f46e9bf8de2b9ca569692843cb1d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800D 15988 bytes

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