Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f852be0c9efbf8…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 20:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f7fdc9fd96743c0add810d79d18cb5 SHA-1: 7416c9a8b7d68446b905026d21c98bdf3c0be404 SHA-256: e8f852be0c9efbf82b577dba007609a5063b9053873b78847c8d9d979141e18d
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to an academic exercise. The presence of numerous links to Shopify-hosted PDFs suggests a link farm or SEO poisoning technique to increase visibility.

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.com/wix?keyword=exercice+corrig%25C3%25A9+bras+de+levier
    • https://cdn.shopify.com/s/files/1/0438/1533/8144/files/kasozod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/15527591526.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/skype_video_recorder_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/nutigevupufamezufowukuz.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/circle_theorems_gcse_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/83781379489.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54183348773.pdf
    • https://static.usrfiles.com/ugd/7598fa_4406e593d52545dfab2f07eef682401b.pdf
    • https://static.usrfiles.com/ugd/98857b_2c5321af6c564c4588eb187cc70c78aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_67a5ee8dde504dfd8d09119a4d987df7.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_15454b58f0d2439fa3a80fd43215d7c5.pdf
    • https://static.usrfiles.com/ugd/1be480_01d9b8534c804be08dc2ffa0b985946d.pdf
    • https://cdn.shopify.com/s/files/1/0430/8041/7447/files/different_weather_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2109/8408/files/asana_pranayama_mudra_bandha_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6234/5384/files/focus_group_interview_guide_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/armored_warfare_public_test_server.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/33500727100.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_off000060e7.bin
e78be58f0bfa69802d8fd2327cfb1349f70ef25e0b1ad15bcf8d2d30a884fce7
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 5472 bytes
font_01_sfnt_off0000734d.bin
7fbe5a31da4168b47eedf1bcd114edfbfe7c3617a9c451f1e5b45bc242bb53ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 19404 bytes