Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef07c51b7a994ac…

MALICIOUS

PDF

46.6 KB Created: 2020-08-02 10:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb95055cb056b8d98616c510b414d6a SHA-1: 9ff6fa0b635b3f90da60c86c90bc52ba82733b51 SHA-256: bef07c51b7a994ac84ca79a2c7bbf074a9f62d02e1fac0cf7eedab3a058635b6
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=convert+array+to+string+php, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a phishing or redirection attempt.

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=convert+array+to+string+php
    • http://files.samanthaamatoportfolio.com/uploads/1/3/0/7/130738792/ff795e7197291.pdf
    • http://files.theagingmusician.com/uploads/1/3/1/4/131453031/9376970.pdf
    • http://files.agileleantransformation.com/uploads/1/3/1/4/131453015/6faadffa6fa35.pdf
    • http://files.adagencyvaluations.com/uploads/1/3/0/7/130740563/e7b23.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/86498565414.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/7034217740.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/69502005374.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/3638280933.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/64617517955.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/kovafizir.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/jajedosemuxigafebisiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/2271/9912/files/83347494850.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/rujaxigomi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/discord_dm_auto_deleter.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/m_bc_3.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/xemipidupogewuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.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/1/0431/7646/0447/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a4f.bin
6528542c20aa4f7343ac8e81c13f8992b4aa3a35f3b1db4f1c9fe27a32adb833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 5116 bytes
font_01_sfnt_off00007bbd.bin
e62d083e2539dd102c1718a0961efc6d329b05e29c0a4b1ce474072fd34f88e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 15180 bytes

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