Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55e7faf896e1dbe…

MALICIOUS

PDF

34.3 KB Created: 2020-08-15 20:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac15a4e2e0534b44bd2f9e55ef2c87fd SHA-1: 280e8c53fcd9a3eb276d2e6739929c66bc1c5587 SHA-256: b55e7faf896e1dbeb3a50d40653eebb74f94099b6d5ee121e2cc5beeab320511
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'cracker barrel pecan pancakes nutritional information' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results or distribute malicious content.

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.cc/pify?keyword=cracker+barrel+pecan+pancakes+nutritional+information
    • http://files.cohenbrosracing.com.au/uploads/1/3/0/7/130775537/054f2aded4c27.pdf
    • http://files.hsfhomeconnections-hsf.com/uploads/1/3/0/7/130740180/doludarosu-fefovavatosuki.pdf
    • http://files.westhay.com/uploads/1/3/1/0/131070407/juleleja.pdf
    • http://files.natasha-biggs.co.uk/uploads/1/3/1/4/131454791/2543048.pdf
    • https://cdn.shopify.com/s/files/1/0437/2729/0518/files/information_about_charminar_in_telugu_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/6450/9094/files/mufedafutesusekinebup.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/basic_civil_engineering_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/xopunupivasatike.pdf
    • https://cdn.shopify.com/s/files/1/0432/2171/3060/files/missing_411_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/8874098269.pdf
    • https://cdn.shopify.com/s/files/1/0431/4854/2109/files/pezem.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/sogute.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/xifasijatebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1036/files/endoscopia_bariatrica.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/dictionnaire_technique_electronique_anglais_francais_pdf.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_off00004889.bin
6cbc0bb822bc689bc3fb25dd861b7d76712ec64806cf1bb5118a9519193e9b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4889 5268 bytes
font_01_sfnt_off00005a5a.bin
c49c7ac72c9addca0e460e07f48073ae6e0b4bd65249042667ee3f4560d654be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5A 9892 bytes

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