Malicious PDF — malware analysis report

Static analysis result for SHA-256 109f525112b7ce4b…

MALICIOUS

PDF

62.2 KB Created: 2020-09-02 22:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2121f31bb31680a6f7b9896b9e331d0c SHA-1: e3353d07494449a27d2ba119b6da7a57c1d6eacd SHA-256: 109f525112b7ce4b36dd899b7a42f413d99e0b31ad0659bdc01ba588390eec04
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to mimic search results, directing users to a malicious redirector. The primary malicious URL identified is https://ttraff.club/wix?keyword=hindu+calendar+2019+varanasi+pdf. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user trust for redirection to potentially harmful 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.club/wix?keyword=hindu+calendar+2019+varanasi+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b7ed05_c407f9117ab0413097cf9c01746743b8.pdf
    • https://static.usrfiles.com/ugd/87d215_022e7f9e23314fc8ae74cb520d189a44.pdf
    • https://static.usrfiles.com/ugd/2ca09c_f8722631ca9a4534b75425c055f2ff9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fa69218529147fcae3f294073b34b4a.pdf
    • https://static.usrfiles.com/ugd/aef5b7_c3daccfd97f3420bb7517e4ec24edb0c.pdf
    • https://static.usrfiles.com/ugd/b28561_6f9715b6dd974e3699ab43862cd4b1e2.pdf
    • https://static.usrfiles.com/ugd/a8cc01_9abec18c2c6149f199779d7fd01f97b9.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/perorazuligivasotet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/gamubegeresowebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/wasolaraw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/pinosoda.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_off00008a23.bin
c91dfa9cdc5aafffcc22977fdf596673cdafe68eda9e0ddd52f95cde191f1e55
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 5652 bytes
font_01_sfnt_off00009d72.bin
8b022cf3042c9c8cc86fa6833007dfe9e3214e20fbe4cb467af544ebcb63b811
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D72 14080 bytes
font_02_sfnt_off0000c9b8.bin
283212d7ce6eb02055805e52b0c8ccfae4f76088eca1fd12d951d667a71ed9b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B8 10656 bytes