Malicious PDF — malware analysis report

Static analysis result for SHA-256 31401061607afaba…

MALICIOUS

PDF

43.4 KB Created: 2020-08-25 02:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abae55280e073b85915a8be0b347efa8 SHA-1: d80bbb67aa8d7e8f3cc2d4dc97e3dc25f1419401 SHA-256: 31401061607afabae6cfc6bc49aa57348847d72cb491d301620f8a91ff1d398d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=kalender+2019+pdf+sch%25C3%25B6nherr'. Additionally, it features a link farm heuristic, indicating a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0437/2781/4810/files/fodisurojoronig.pdf' being the first listed. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of malicious redirector links strongly suggests a phishing or malware distribution attempt.

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=kalender+2019+pdf+sch%25C3%25B6nherr
    • http://files.djsk8.com/uploads/1/3/1/6/131637125/tadoxezanur.pdf
    • https://cdn.shopify.com/s/files/1/0437/2781/4810/files/fodisurojoronig.pdf
    • https://cdn.shopify.com/s/files/1/0432/6434/4219/files/detailed_information_about_gst.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/mappa_turistica_bolzano.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/rufetazurobazax.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/81679905018.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/gonojemafiguferexigeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3557/files/fiwoxufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/77862302020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/75172280774.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/depipujavawedogelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/xunofexodematogofiti.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_off00006571.bin
ae3cddb7932ed263254e60d22f8f68a1e0441f333dbe603f38657ec65dca144c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6571 5832 bytes
font_01_sfnt_off00007901.bin
4edc1fed6863143e824f461260fa9b1cb37a6c35c49272d7672d9ea16658b0bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 11912 bytes

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