Malicious PDF — malware analysis report

Static analysis result for SHA-256 76062fd306e1a9c9…

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 14:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6b56ff0da028d178b7bb48907a869ce SHA-1: 5ff31d26beaeb8ff47f0a7ad3f2c8a9454273ee3 SHA-256: 76062fd306e1a9c9f9759decc92d13cb6af0f8fa613a376aaa760438e3667d4a
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.com URL, which likely serves as a redirector to a malicious site. The document body contains obfuscated text and embedded URLs, consistent with a phishing or malware delivery 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.com/wix?keyword=the+chambers+brothers+discography
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/payback_period_exam_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/zolirupepisedalijuribo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/aprender_a_desenhar_corpo_humano.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd0df82da68746e39996f5a9de575e1d.pdf
    • https://cdn.shopify.com/s/files/1/0448/0358/8258/files/gazab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0838/files/zweckform_bautagebuch.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/ned_yoyo_tricks_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/2891/9973/files/sittin_on_the_dock_of_the_bay_vocal.pdf
    • https://static.usrfiles.com/ugd/173616_7f4848f8d3b548caae1280ad7366eda7.pdf
    • https://static.usrfiles.com/ugd/89c6ad_f86e1d8885314d50b9d1af1c06d59b5e.pdf
    • https://static.usrfiles.com/ugd/361045_e186f1b0da3b4d919edaec386eef93ad.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6c96c2d281974108ab08ff5b1ae8ddd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b7f2b0c200b401ea62610955f037079.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_off00006c0a.bin
510675918e41ec8e5e9cfc515159939115700453e231c33ed7a443816499264b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 5644 bytes
font_01_sfnt_off00007f12.bin
74ed6d1ef44056404198e7861c73c69f822aae45bfc418bb838bb4aee51af868		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F12 10076 bytes

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