Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ec9c8b40b6ab27…

MALICIOUS

PDF

51.9 KB Created: 2020-08-26 00:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c466e5e0df1e661bb123f3024b42d1a4 SHA-1: e909d5558e84acfc57b6c39cd0d098afe2f0fd4b SHA-256: 40ec9c8b40b6ab27a23a0173bce59ab1a3c6c8d6d0876398932348caabe83eba
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ver+los+diez+mandamientos+online'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external PDFs, including one hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious infrastructure.

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=ver+los+diez+mandamientos+online
    • http://lerogeba.starsoftexasjuriedartexhibit.com/uploads/1/3/1/6/131637047/7691642.pdf
    • http://doselofe.mountaintechnicalsolutions.com/uploads/1/3/2/6/132696067/437f979bba74698.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/upstore_premium_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/rodebitume.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/rival_ice_cream_maker.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/xovik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/diwufumotexirafimog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/articles_usage_rules.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/schema_ampli_audio_200w.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0435/2235/9451/files/ararara_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/sample_cover_letter_modified_block_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/beethoven_piano_sonata_no._7_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/8097/2456/files/88518688446.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_off00007fe7.bin
2c69acc5fad77694e89300dd346bcbb92b69b5227980125607bf40219c21440a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE7 4984 bytes
font_01_sfnt_off000090cd.bin
a8036f0702917946cd20f2d491f0bbd31baf18870c2320a5a688dbbe47d3b436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 15736 bytes

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