Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c6492b0ab6d52f…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 09:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a2d11cf348e18d163b135874eee8f4 SHA-1: a2a8d99eca817a5475765703213f61217d21d099 SHA-256: 65c6492b0ab6d52ff8cc9a86a766b3168340fcacf385170e4717c8b9390eee4b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL, 'https://ttraff.com/wix?keyword=yorushika+hitchcock+piano+sheet', identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=yorushika+hitchcock+piano+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/71fd01_074a040c8b554b428a12679c09b4e4ad.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_742d8061ff2f42adbddf4a18ba151a94.pdf
    • https://static.usrfiles.com/ugd/289c5e_a99ba3488474445c9e38cb3cb6a1054e.pdf
    • https://static.usrfiles.com/ugd/b8c837_78815afcbd314ba7a3e3479d351b8734.pdf
    • https://static.usrfiles.com/ugd/fd3290_873a3efab3dd463f988d383c44093307.pdf
    • https://static.usrfiles.com/ugd/b8c837_81ca39a2bb984dfaaf0607ac5dc7eed3.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/1104522167.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/lubejidafagiw.pdf
    • https://static.usrfiles.com/ugd/b8c837_54acd1b4359e40bab030e4b644c34145.pdf
    • https://static.usrfiles.com/ugd/0f1814_c7e57f8423f74476896f3f127f9f6e36.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_22457a11d315401abfc25eb29696eea3.pdf
    • https://static.usrfiles.com/ugd/fe83c3_a86e463bc39248b2a7e13e6c248aa7b0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004511.bin
b1853dca1fadef8f040f07e60cd97e4fc3ca41fd2c17554f66b1ef36a48116a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4511 3900 bytes
font_01_sfnt_off000052f5.bin
91ea49ae7ae2a4043953340270ec8f7f7c6387f38b7a863aa0be0433598e5235
pdf-font-stream PDF embedded font (sfnt) at offset 0x52F5 5012 bytes
font_02_sfnt_off000063fd.bin
f44250472fcaf029cf179a18137c48bb514bc10996d33e5e4305d4791164fbad
pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 10024 bytes