Malicious PDF — malware analysis report

Static analysis result for SHA-256 248670c842982550…

MALICIOUS

PDF

40.2 KB Created: 2020-08-20 02:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c239c9705e7bc0f3af379c657439aea0 SHA-1: 8f98c2cfed88fe14125fa227ca37f31153e4bece SHA-256: 248670c842982550e7e661617fde301f7620d1d3aa8b53be36b09bfb8c477758
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a free webinar template. The link directs to 'https://ttraff.ru/pify?keyword=free+webinar+powerpoint+template', which is flagged as malicious. Additionally, the PDF contains a large number of external links, many pointing to Shopify domains, but one specific URL 'http://mekorif.juliacernydmd.com/uploads/1/3/0/7/130739275/7c5662.pdf' is also present and unknown. The ML classifier strongly indicates 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=free+webinar+powerpoint+template
    • http://mekorif.juliacernydmd.com/uploads/1/3/0/7/130739275/7c5662.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/49102733195.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/jirafixo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/gaderarunigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/nemisekukomemobolojetis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/89861679290.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/electrical_engineering_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/griggs_reservoir_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/90246562571.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/86651449244.pdf
    • https://cdn.shopify.com/s/files/1/0465/0257/6286/files/facebook_for_windows_8_mobile.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_off00006168.bin
ce230c8d7d505e7f7e5cddbb2eba1e359c74dfde79807b38403f314ff65dcc51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 4972 bytes
font_01_sfnt_off00007248.bin
7bdd512e383c78ddc723152729b5bcda0e1d7eb5bd8b20d9817fcb3e21387b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 9976 bytes

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