Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac6d965cfcb6be6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 21:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185b2f74fcd05c99198ec81db848d258 SHA-1: 89a6e7220455f1bdbf471d42269e728b8d10e92c SHA-256: 3ac6d965cfcb6be6c507ec29216e405db6b19066c182c01c6aba97809f31adc6
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'easy auto clicker 2.0'. The ML classifier strongly indicates maliciousness, and the PDF is flagged for linking to known malicious infrastructure. The document body, though heavily obfuscated, contains the target URL and references the lure. The presence of a link farm suggests an attempt to broaden distribution.

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.ru/pify?keyword=easy+auto+clicker+2.+0
    • https://static.usrfiles.com/ugd/c3548c_bc5eebbe763246bc8fb311a426d3a9eb.pdf
    • https://static.usrfiles.com/ugd/e2b09b_b953d8516eea45099e4978734d9123f7.pdf
    • https://static.usrfiles.com/ugd/b7306e_6f852b8fdb314f0bab53153d0d828134.pdf
    • https://static.usrfiles.com/ugd/67e251_e5f2851a7c734689a9995fe6d4cccc7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d8345793724ebf8e47b8b2e268f02e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/74478647627.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/banishing_ritual_of_the_lesser_pentagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/bimuxunewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/analytic_philosophy_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7189/files/36292253203.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_383dc259166c41169741b6ac8c0d806c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4070b95493a40ac9285ce3d84f40896.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_off00006e3f.bin
8f618b3256644ec6020c53ddeffb3b3f19e4e13032ec8fc2f4e8fb857cf08d29
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3F 5224 bytes
font_01_sfnt_off00008022.bin
01493f713a0b7cd491d4582ffefcd650f8da4937365723375e1cddc7f03f9bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x8022 11152 bytes