Malicious PDF — malware analysis report

Static analysis result for SHA-256 042f42cc653a54fd…

MALICIOUS

PDF

48.2 KB Created: 2020-08-16 20:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8f445097157e73802403d0bb4f527c SHA-1: 1f27e074ddcb31276ce14b56d1f7698d49b52872 SHA-256: 042f42cc653a54fd5a857a45f58ef0c43cb2dfbc835a9e7f3976e64693c8507f
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a redirector service, which is a common tactic for phishing and malware distribution. The document body, though obfuscated, contains text related to a 'Galaxy s9 data sheet' and a URL that appears to be part of a link farm, suggesting a lure to a malicious site. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent to lead the user 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.cc/pify?keyword=galaxy+s9+data+sheet
    • http://files.spazhealer.com/uploads/1/3/1/3/131383838/wupim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/vawafigirokinitidobanu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7056/files/tipawolagajig.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/figefopokatupu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/90482884469.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/pabexabevefotodulamiloji.pdf
    • https://cdn.shopify.com/s/files/1/0439/1577/2059/files/gudutulex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/65357595529.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/ramudirifusadiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/pamimugubewolu.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_off00006de1.bin
bd1d99017235f0f9556422b48cacba001e716e59192b78cc42a3a98cc55af9ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 4696 bytes
font_01_sfnt_off00007dec.bin
299b0d54c5927a6e10d3e78141da5d68518007a5b3a7451295816165e385e3cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 12712 bytes
font_02_sfnt_off0000a6c1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C1 4324 bytes