Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14b6420b214f93a…

MALICIOUS

PDF

49.8 KB Created: 2020-08-18 20:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b53982100ae5ef78aa117770e8e2259f SHA-1: 10ea927779f4652dafac3593ee1a3268f0e2cc4a SHA-256: d14b6420b214f93a0e98c78cfb24bf1cf67d9b056798c387477b4f3aef16877a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine rankings. One of these links, 'https://ttraff.ru/pify?keyword=video+er+ios+6.+1.+6', is identified as a malicious redirector. The document body itself is heavily obfuscated but contains references to the same malicious URL and other benign-looking Shopify links, suggesting a lure to a malicious site.

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=video+er+ios+6.+1.+6
    • http://files.ironstonemeadery.com/uploads/1/3/1/3/131380803/2697791.pdf
    • http://files.rodas-projects.com/uploads/1/3/1/1/131164355/kokagamivezina.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/bertolli_olive_oil_spread_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/berliner_platz_2_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/jegerig.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/pivegexadaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/kolawigub.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/97703624447.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/8699123655.pdf
    • https://cdn.shopify.com/s/files/1/0435/0941/6095/files/peer_assessment_rubric.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/73832578396.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006b94.bin
9c69a843be998b6a3285533d00d549b647fb5433bee3fafd38b0166f43d18666		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6B94 13524 bytes
font_00_sfnt_off00005b40.bin
542e92c14c4c965dabb68ca4508e9ca806d6b82256f425addf1f6ee17be91730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B40 4780 bytes
font_02_sfnt_off000091a9.bin
0432c04794da19b9bcb81602db7d1b321b6562f2104d2c6f9dd3a0aefe036384		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A9 12776 bytes

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