Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6f4b431eb08ddb…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 18:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e76e5c902d2ee13434803b666b7dccb2 SHA-1: 6eb96e96192e2590dfd8324c2cb263011b1b7bb1 SHA-256: 9f6f4b431eb08ddbc07ffe301cbc548b8adcb0be200df54db2b172540c15a05e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lure users into downloading further malware. The document body, though heavily obfuscated, contains text related to 'youwave emulator free for windows 10' and the malicious URL, suggesting a social engineering tactic to trick users into clicking the link. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm SEO strategy to improve search engine ranking for malicious content.

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.me/wix?keyword=youwave+emulator+free++for+windows+10
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/74904905130.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1045/files/niwivibopulofaxoziki.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/algorithme_gntique_exercice_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/39031908994.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9564/files/terms_used_in_banking_and_finance.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b0baae31ebb478ab4b0076d79f0c987.pdf
    • https://static.usrfiles.com/ugd/b8c837_34adb5eaa6b245c2b452b7330120860a.pdf
    • https://static.usrfiles.com/ugd/60933b_81ad33f45f124d3d9dbd04bac60d09c4.pdf
    • https://static.usrfiles.com/ugd/19103d_14e933ccb3f64b1dba504420e8d023fe.pdf
    • https://static.usrfiles.com/ugd/e4a001_6b87381cf637422db22f89b2ab577162.pdf
    • https://static.usrfiles.com/ugd/41a0b6_7a43394027af4683861bca0296fce8b5.pdf
    • https://static.usrfiles.com/ugd/55cc32_e92a19d11d344e2f8d45e49768f22bf2.pdf
    • https://static.usrfiles.com/ugd/89064d_bfa2893f6c014d39a198baa1922241ee.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_off00006bb9.bin
08a97564dbc535501050eb4c0464aadf43dd9440226974fda537bf37d1934c34
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB9 5360 bytes
font_01_sfnt_off00007dfa.bin
fb6f25bb06ba539b61981120e123a08892785b3c3313761ba27b9e829df5eb59
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 11276 bytes