Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc8a0fffd491405…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 22:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1644115ce8b04e894ea3eaa8b0c6f1be SHA-1: fe602b8b7c60510b12f3730c0eca22fbc02ab6c6 SHA-256: fbc8a0fffd4914051fb4abdb0d6e2f60af8466eafb4ef3ab1767345c633fa21d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=high+school+musical+2+original+soundtrack+download'. This URL is presented within the document body, suggesting a lure to download content. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious files. The ML classifier 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.cc/wix?keyword=high+school+musical+2+original+soundtrack+download
    • https://static.usrfiles.com/ugd/b8c837_166c583fa7264da5955d4ece513af4a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_4493b3712e744fbdae29f68889328556.pdf
    • https://static.usrfiles.com/ugd/d54300_3dbc0998dcca4306a2bc6576548970fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d6c28f4f1634f46804adda5f68eccf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f49eabad86f048a197efaeb994fdb866.pdf
    • https://static.usrfiles.com/ugd/b8c837_52612a50485548a5aecd898dc5b1ef55.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/captain_s_daughter_pushkin.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/11957289895.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/juxoxidak.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/61318083253.pdf
    • https://cdn.shopify.com/s/files/1/0467/9945/4359/files/aynalarda_grnt_oluumu_ve_yansma.pdf
    • https://static.usrfiles.com/ugd/b8c837_1901bbf3cc8c4bffbe11629adf3d6f60.pdf
    • https://static.usrfiles.com/ugd/b8c837_d160ce30a08f43b8a5703c44dd9143de.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_off00006a4e.bin
734f8e23a0a51da216415637e3ef392e288853401ab659e50dcacebe9d2c6830
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 5604 bytes
font_01_sfnt_off00007d42.bin
474fc0eebfa5efd706d21c04e7f40c2096b4b76e9e76c7e5d1d81c75a873eb5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D42 10624 bytes