Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95ccdf4550b1cd2…

MALICIOUS

PDF

46.6 KB Created: 2020-07-29 12:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 695f7a4cc71898b960bac5d5dab5cf0b SHA-1: e93ba094b9442cd1f7d19dd87851a24432498abd SHA-256: f95ccdf4550b1cd2131a2ffcd6f840e70d69283abb916b48b3df3c86271c0924
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/pify?keyword=conundrum+book+anuj+dhar+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous links indicates an attempt to drive traffic to external resources, likely malicious.

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.cc/pify?keyword=conundrum+book+anuj+dhar+pdf
    • http://files.sparklyresults.com/uploads/1/3/0/8/130874043/7609561.pdf
    • http://files.melindatuhus.net/uploads/1/3/0/7/130775970/ribufaximoz-fixigufelen-dapujab-damarorarepul.pdf
    • http://files.discoverhispresence.com/uploads/1/3/0/8/130874058/7867916.pdf
    • http://files.berkshireheros.org/uploads/1/3/1/4/131409009/6819035.pdf
    • http://files.discoverhispresence.com/uploads/1/3/0/8/130874058/
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/nafojof.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/29050571526.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/lexebajimalemizemupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/38793975592.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/tegokexivejubuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4367/files/pusera.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/63519541878.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/jajafoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/82977452153.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/mivisubawigor.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/37714617336.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_off000078f6.bin
d6fdee85d4a4a2e39648df33abb9b98ca0d4b22d25023f8e29f5c39a936b29c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F6 5012 bytes
font_01_sfnt_off000089ca.bin
a11596a0071aa675be28d9ae8b39996d774a8782343e3f11585f92f01919b3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89CA 10528 bytes

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