Malicious PDF — malware analysis report

Static analysis result for SHA-256 4920fe5436d673bd…

MALICIOUS

PDF

35.4 KB Created: 2020-08-18 20:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c8e4491e162c46d966a1999105bcaa SHA-1: f2fc7bd2f871d0019d230e7a87ad5e9607be37b3 SHA-256: 4920fe5436d673bd543c3d90f6a672f3741239c8f88e789c24d6d09ed91d1fff
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=spider+man+2+psp++free', suggesting a lure to trick users into clicking through to potentially malicious content. 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.cc/pify?keyword=spider+man+2+psp++free
    • http://files.nowandzenpet.com/uploads/1/3/0/7/130775658/lonowonavivikebox.pdf
    • http://risora.bwscholarshipfund.com/uploads/1/3/1/6/131637881/60effefa57e4.pdf
    • http://files.jymshd.org/uploads/1/3/1/4/131407423/xoxomagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/xixoxunatexajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0898/3203/files/luka_just_be_friends.pdf
    • https://cdn.shopify.com/s/files/1/0439/3854/5819/files/58480218521.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/calottery_winning_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/best_reader_app_for.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/wemixiremofejosenit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/64230204085.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/dazixuvefosuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/70532252268.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/nivazasazopalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/vesafuvepoko.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_off00004c3c.bin
648097136ae8025fce6436ad30461e9975ae7ab9d9a88ea216c32624cd02e815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3C 5392 bytes
font_01_sfnt_off00005e79.bin
1a22c181d4523de0cb861ac12726aa90815d5897e998937c4e332932799935d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 10172 bytes

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