Malicious PDF — malware analysis report

Static analysis result for SHA-256 455e7827c4e5da44…

MALICIOUS

PDF

38.2 KB Created: 2020-08-06 14:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86f44cc94cc0164fc9318da6f55b4f3e SHA-1: c2577a70cdf9cdbc931678b17dc0e4a7049a51a3 SHA-256: 455e7827c4e5da448e0eb44285c88fd14adaba3f4e434dff48d187e1cf9ff401
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and keywords related to 'programme algorithme génétique sous matlab pdf', suggesting a lure to a malicious site. The primary attack pattern involves tricking the user into visiting a malicious URL via a seemingly benign document.

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=programme+algorithme+g%25C3%25A9n%25C3%25A9tique+sous+matlab+pdf
    • http://files.jenniferalvaro.com/uploads/1/3/1/4/131454523/wuridemekaparu_nagejawubesodu.pdf
    • http://files.smokedearthceramics.com/uploads/1/3/1/4/131438195/garadivupe-nunemawuxod.pdf
    • http://files.olympiapoetrynetwork.org/uploads/1/3/0/7/130775309/9657220.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/19298494737.pdf
    • https://cdn.shopify.com/s/files/1/0433/2113/1161/files/icy_veins_outlaw_rogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/19567800335.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/49634113044.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/7542684271.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/wegenipizavimujisoror.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/36682861598.pdf
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/atheist_guide_to_reality.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/39619889123.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/34491061543.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_off00005058.bin
bed1d1ec6ed6b744b201b59d5d1d2617c2db8893f70660c7edc6a5bde7e2e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5058 5864 bytes
font_01_sfnt_off000063d2.bin
bce5355f9639cb89dfa40aea12b634065327c5fd57fae827192969eaa9708d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 11716 bytes

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