Malicious PDF — malware analysis report

Static analysis result for SHA-256 492cb806857cd84d…

MALICIOUS

PDF

47.9 KB Created: 2020-07-27 15:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46672b7f72e01d993a1c86ca425b9b68 SHA-1: 892611957e875292b6362f0577403f88d3413965 SHA-256: 492cb806857cd84d529f193b8e54ef142cd115b62b326d87b4023e801b312a15
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, hosting numerous links to PDFs on Shopify domains, some of which are confirmed benign but others are unknown. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of the redirector and link farm strongly suggests a malicious intent to lure users to external, potentially harmful, resources.

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.com/pify?keyword=balancing+redox+reactions%2528+half-+equation+method+worksheet
    • http://files.joewilkinsonstudio.com/uploads/1/3/1/4/131453436/tusunizo.pdf
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/3/131379899/47c1cb.pdf
    • http://files.jessicafeldheim.com/uploads/1/3/0/7/130739061/zunevofin.pdf
    • http://files.atlaslincoln.org/uploads/1/3/0/7/130776001/2385120.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/wasufazezefovewimegozeko.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/mofowatofofada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/9898064454.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/1440569993.pdf
    • https://cdn.shopify.com/s/files/1/0432/7207/7475/files/84068991125.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/77301540093.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/wubilotel.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/99793908355.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/gezenebezur.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_off00007a61.bin
a7cc9600dcda95104a5b2ea5c12c2acd31629665baf1efcd10294d4110e3b33e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 5824 bytes
font_01_sfnt_off00008e1a.bin
0931f6bfbb726737fa4a9b0d636c4a0a8982e179464c2d55c448412e1933be6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1A 10696 bytes

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