Malicious PDF — malware analysis report

Static analysis result for SHA-256 3522f147715b6c81…

MALICIOUS

PDF

50.6 KB Created: 2020-08-01 02:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a56e2b62af64d8fd6e4d4cd6450ae9 SHA-1: c9599435941b5f4f729b20e4e41bdd05e5fd847d SHA-256: 3522f147715b6c81464d2d1b0fdd3f4b0e1a4eec17fff4cec8c28d737512c1f7
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely part of a phishing or malware distribution chain. The presence of numerous embedded links suggests an attempt to lure users to external, potentially malicious, sites.

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.com/pify?keyword=real+feel+temperature
    • http://files.briankingwebsite.com/uploads/1/3/1/0/131070374/8566882.pdf
    • http://files.seekingthepast.com/uploads/1/3/0/7/130775076/5639586.pdf
    • http://files.fcctboosterclub.com/uploads/1/3/1/4/131438464/juvigodafike.pdf
    • http://files.florologie.com/uploads/1/3/1/4/131407179/a400df88d0d3403.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/99978062671.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/98245632819.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/sopovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/nazudaxajomemijode.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/wogitisunameka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/82507959431.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/41595396420.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/nekejel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/banomuzagaluzeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/20913440099.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_off00007e9c.bin
8e1e01948d625f5195f6247fd09f1264249e99b7f490deab2ceca8a4fced0631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9C 4876 bytes
font_01_sfnt_off00008f27.bin
848b4212c0c2fabfafc43223ef29f32353e6c6e44126450c73e25d7722cfc0df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F27 14852 bytes

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