Malicious PDF — malware analysis report

Static analysis result for SHA-256 d121688e9455998e…

MALICIOUS

PDF

42.5 KB Created: 2020-09-09 19:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d7dd72ec333156439e50fd6c5a8b519 SHA-1: 5b9cddc942bac02d6aa284eababf229ffa6900ba SHA-256: d121688e9455998e97f13d4dfe7c547365ae23dd724ff3e2fac99478af90a1fa
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Avast antivirus' and URLs that appear to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.me/pify?keyword=avast+antivirus+2018+apkpure, which likely serves as a gateway to further 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.me/pify?keyword=avast+antivirus+2018+apkpure
    • http://files.iowaconcreteproductsandmonuments.com/uploads/1/3/1/3/131380786/pajajesa-namedekuv-pupuzivuvitul-nisutofuwuvezin.pdf
    • http://xamajuro.jenniferjostcounseling.com/uploads/1/3/1/4/131405927/5921946.pdf
    • http://files.brightzone.net/uploads/1/3/2/6/132680860/b48e1dfa252e.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/20473760834.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/ralisafaketaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/flexo_printing_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/worejimuvazaloxomubizil.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/abn_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/5598/9404/files/gupupogadep.pdf
    • https://cdn.shopify.com/s/files/1/0443/0423/6700/files/25658469365.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/70535191639.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/46696324751.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/online_auction_system_project_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/xajilekakobib.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_off000067f3.bin
5adc37f5fe5b5f51ca45695e8003a73ae9cd798e513eefc098e16a28891bcaa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F3 5416 bytes
font_01_sfnt_off00007a73.bin
c7b3f04285e882295d7709d5baa39daeee2e9b2aac729a922c1445ba6b61e045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A73 10120 bytes

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