Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed54cfeacd53791…

MALICIOUS

PDF

39.1 KB Created: 2020-09-05 00:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce30348831ce32ba0bf74f85da8ffce3 SHA-1: 4fd566fdb4482c2f4bd65e508cef195de487a9bf SHA-256: 6ed54cfeacd5379132d21dd4b97d1b8f4798de5f52ea958bb2941a09057dedc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, masquerading as a link farm for book reviews and song downloads, with the primary goal of redirecting users to malicious infrastructure. One of the embedded URLs, 'https://ttraff.club/wix?keyword=pirates+of+caribbean+song+free', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=pirates+of+caribbean+song+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/outliers_book_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/pifene.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_8fbdf6907d384a26b6923715492f3df2.pdf
    • https://static.usrfiles.com/ugd/e3325f_d7bdf57cbc564a7eb0c86566fe32cae3.pdf
    • https://static.usrfiles.com/ugd/b8c837_67eb5d5703fc4132aa067bcf59a9372d.pdf
    • https://static.usrfiles.com/ugd/c1108c_77d439103880403aac1f842b5ae23863.pdf
    • https://static.usrfiles.com/ugd/e2c223_12e1ab4033544225a893ce7a9fc13c65.pdf
    • https://cdn.shopify.com/s/files/1/0439/0636/7656/files/61247052586.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/62420565503.pdf
    • https://cdn.shopify.com/s/files/1/0435/7239/6193/files/dutuzujefesol.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000538a.bin
49b04c34cd05fd5a7fa10929c5bd95b9762a9097fd010db2f483299048c73e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538A 5156 bytes
font_01_sfnt_off00006527.bin
a09e41617bb3a652ef4dc08d3258c38deb448133d3cec2184362626e96a7145f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 13476 bytes

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