Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5b0d0b10f714c9…

MALICIOUS

PDF

51.6 KB Created: 2020-08-24 23:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e4a9c9c097f58c0e207f10965a26856 SHA-1: 5c568d5b9610e68d8dee9f6123c4dd63452ffb4f SHA-256: 8f5b0d0b10f714c9ab0f4f046ddf823c0b282c1b84cd943fdb242366a4d650fc
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=android+textinputlayout+gradle', is directly linked to this redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the document's purpose is to drive traffic to this malicious site. The presence of multiple unknown URLs further supports the malicious nature of the document.

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=android+textinputlayout+gradle
    • http://bofav.wingateroadrunners.com/uploads/1/3/0/7/130776485/b4e0381632.pdf
    • http://powolebi.cheyennepuga.com/uploads/1/3/1/3/131383708/1371659.pdf
    • http://files.mollybernard.com/uploads/1/3/1/3/131380511/524dd9b88dc3.pdf
    • http://bomukez.rawthingsonly.com/uploads/1/3/1/4/131408027/jobiw-temetiwegamiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4679/files/android_browser_hijack.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/environmental_risk_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/52571204697.pdf
    • https://cdn.shopify.com/s/files/1/0446/7684/1635/files/41395278757.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/90034128577.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/way_back_into_love_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/handbook_de_excipientes_farmaceuticos_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1733/0075/files/effects_of_globalization_on_zimbabwean_culture.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/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ea0.bin
c94e4a3fc8ed44f7ecf26a3075f8ec87d11371d48375bd30166aa80f5a154efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 5108 bytes
font_01_sfnt_off00009019.bin
44f085b64797368cc81e43a1f6c3c96586b6fc7de9829d41f6db1842b78e4287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9019 15756 bytes

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