Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb53a3b5692e416…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 12:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a80ada4800b4a9c02bb1c4a6a7dafc3b SHA-1: 0b4a208b043b1b30e6179eed4bc3da64881c549c SHA-256: 8bb53a3b5692e41696bca0dc270efced9dab87b00f13f9c3eae9d565269a0945
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious redirector URL is https://ttraff.ru/pify?keyword=baggins+calorie+information, which is likely used to distribute further malicious content or lead users to phishing sites. The ML classifier also strongly indicated maliciousness.

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=baggins+calorie+information
    • http://files.traditionaldivisionband.com/uploads/1/3/1/1/131163898/ee01899f52f.pdf
    • http://files.agnetamlindh.se/uploads/1/3/1/4/131408024/givezojisux-xomonemafa-nuwizi-nutoxeg.pdf
    • http://files.cybermongol.ca/uploads/1/3/1/4/131406841/4984c.pdf
    • http://kolol.twigny.com/uploads/1/3/0/7/130775883/dafifuwitikizem.pdf
    • http://wamofufum.volkehistorymodern.com/uploads/1/3/2/7/132710507/6333bad2dccd014.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/lavubinuroxozilavakax.pdf
    • https://cdn.shopify.com/s/files/1/0438/4237/1741/files/nomibiposivosimug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/11257236299.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/subject_and_predicate_worksheet_for_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/soxal.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/wasupojiluxelofamiren.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/64926368118.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/gosesodamutox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2823/4908/files/41578840741.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/28178684152.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_off00004b17.bin
e90de1b2bf2d3c12aafc690789ff297744add6e68f13edcab430c15669d28d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B17 5252 bytes
font_01_sfnt_off00005cd6.bin
d273a051a950a5e853cea5a75e1c732dca202f6969bb54a732e03a556885a710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD6 10084 bytes

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