Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ba49e9ff6bc2f1…

MALICIOUS

PDF

44.5 KB Created: 2020-09-10 00:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67008c9e30918a7f206df7d5fb0e5eef SHA-1: 009ea902b688b6c7b4e98302808931156e0a47a1 SHA-256: 07ba49e9ff6bc2f1cbcb71faf0408fdcba031baff234668e1cd18ace52c32404
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain a lure related to 'happy birthday to you song lyrics' and the malicious URL itself. The ML classifier also strongly flagged this PDF as malicious.

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=happy+birthday+to+you+song+lyrics
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c162b3_cf485b5f50f94c5587c0b17903a5ef94.pdf
    • https://static.usrfiles.com/ugd/b8c837_5972aac43e9e4125bbefbae86d13f219.pdf
    • https://static.usrfiles.com/ugd/bdc04d_618d57a33bf240848353897d889d99db.pdf
    • https://static.usrfiles.com/ugd/fef373_42e0ffaddd074a4c89648cef29673a5f.pdf
    • https://static.usrfiles.com/ugd/49488e_c7fd637e559542caa2367486ba0b8b3c.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/rafigofilunogopowakuzezad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/rajabigokopabis.pdf
    • https://static.usrfiles.com/ugd/121e37_d53f0ceaf0cf4e28a31afe2fa1db3fa9.pdf
    • https://static.usrfiles.com/ugd/738632_f60a5115c4264efa8a7dbf00076bf196.pdf
    • https://static.usrfiles.com/ugd/9dda13_19cd336a04904eb785c397f8b29cabf0.pdf
    • https://static.usrfiles.com/ugd/590778_f4c08584271d46bb85cf6dd0b7d087a6.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_af5f4ad1f716408fb13542016940c777.pdf
    • https://static.usrfiles.com/ugd/2f07a1_ab071991e0ea47439807bdddc2c17b89.pdf
    • https://static.usrfiles.com/ugd/2072cd_d7c4a5a69c3f467686ad2809bd82c473.pdf
    • https://static.usrfiles.com/ugd/dcfb95_63c3e336f54845c0adf414ebcbbde3db.pdf
    • https://static.usrfiles.com/ugd/b27199_9a32289f7f914145989e65802ff38484.pdf
    • https://static.usrfiles.com/ugd/d99ef3_471e15a4228d4666b3b781fab3b112f0.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_off00006eda.bin
91e0ca9c7cb82f082c1cf6d4fb4f199d57d8c6eca77e79a148aac5cef2d3cff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 5536 bytes
font_01_sfnt_off000081a6.bin
5d757a3abc90a41d0adbf84f64c129b15899e0932f7136907b0a0f5bd005e624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 10272 bytes

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