Malicious PDF — malware analysis report

Static analysis result for SHA-256 52debb2e36f48ade…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 04:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5edfe3efa74d424b00ed6c6f0456ae3 SHA-1: c7e6c62620993e763743294e990efeb2ff10f1e3 SHA-256: 52debb2e36f48ade189f86cd3af0dcb80c1cb2f035a3908a9a1728ecc6927dad
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ielts+band+descriptors+listening+pdf
    • http://files.rozannaartist.co.uk/uploads/1/3/0/7/130775698/nuladatopizufes-zobanerijasigu-dubusekizow-jadum.pdf
    • http://files.fullvase.com/uploads/1/3/0/9/130970003/5678519.pdf
    • http://files.chandlerglaze.com/uploads/1/3/0/7/130739937/8338086.pdf
    • http://files.sahasrashope.com.au/uploads/1/3/0/7/130775704/dotetugotusiri.pdf
    • http://fekutilak.maisyandlolarentals.com/uploads/1/3/1/6/131637814/sarapulux_wufataluwa.pdf
    • https://cdn.shopify.com/s/files/1/0452/2478/8128/files/python_language_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7537/9101/files/26158127619.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/kubafotijuwavifoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/busezovorafetafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/15813507232.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/monthly_planner_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/approximation_and_simplification_questions_for_bank_po.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/sarudajugefipemofugelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/xinen.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/convert_to_base64_encoded_string_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/1630354790.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/amebiasis_genital.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/43464228092.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000658a.bin
5c751a8b59ad3a62618f9ef8b92f5d28abbd46d9837fb5f82fece046b3eb106d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 5400 bytes
font_01_sfnt_off000077e5.bin
2b147792f3e8edcc786108de623f998dcd8be61f7805f0c2096ec2cdee9ad5c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 10060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.