Malicious PDF — malware analysis report

Static analysis result for SHA-256 572aed3b0a21d45c…

MALICIOUS

PDF

50.9 KB Created: 2020-08-08 12:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b15f34927b0f55d2fc9b5385c50e7762 SHA-1: 78b7d6a8a8fac6fe2c5520fe9db17820fe43385e SHA-256: 572aed3b0a21d45c74a6689151c8c61379a5166170d459be921854cbf3783034
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, suggesting a broad phishing or malware distribution campaign. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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=solving+quadratic+equations+graphically+worksheet+pdf
    • http://files.marvlindbergmysteries.com/uploads/1/3/1/3/131379312/tudap.pdf
    • http://mijabupip.loudmouthofsl.com/uploads/1/3/1/4/131406390/zodibezojadu.pdf
    • http://files.storywings.net/uploads/1/3/0/7/130775403/xumoboxof-jasasavowogarag-lamizexo-wuwaxoromit.pdf
    • http://files.yogatuned.nl/uploads/1/3/1/4/131483266/5248142.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/viedo_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/gotasorel.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/rubamajorapurununusi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/91336198034.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8182/files/31294091436.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/89334476142.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/luwafekujage.pdf
    • https://cdn.shopify.com/s/files/1/0430/9902/9655/files/78446185507.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/calligraphy_fonts_a_to_z.pdf
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/xololedibigewuwa.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_off00007eca.bin
8a95fd69b9074328532c015d6b0072aa6fb4cec2cb61a1450cf6b8c688c3abbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECA 5964 bytes
font_01_sfnt_off0000932a.bin
a5148039cdfbf9a950fb7da46329d340b5b956ac60f6975f9fe348c2b8632cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932A 13652 bytes

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