Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e663dd59c343ded…

MALICIOUS

PDF

46.4 KB Created: 2020-09-07 11:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0700438cae69f8e8eaf60362ae42fae7 SHA-1: 00b4e581ced62a570179dfc008e5f15470ed4532 SHA-256: 6e663dd59c343dedbe0f79ad53af23686749281577e4462c2dd01727fc319fad
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'internal audit programs templates' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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=internal+audit+programs+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/dipipasuxi.pdf
    • https://cdn.shopify.com/s/files/1/0461/5412/1379/files/62695855061.pdf
    • https://cdn.shopify.com/s/files/1/0465/1492/9822/files/block_ads_on_twitch_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/dokifamojem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/juxalopuzokitiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/kaspersky_antivirus_free_for_mac.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_dd318566a1994f0e8a61038d16741760.pdf
    • https://static.usrfiles.com/ugd/bcc0e4_dea99ace4f9948c8908974af907cc508.pdf
    • https://static.usrfiles.com/ugd/e78b77_e9f0fbcedd214eada23f6d69f1523c96.pdf
    • https://static.usrfiles.com/ugd/b3bc21_f1247ae5da9f46a9a3910b33394c6c16.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1130/files/64887735539.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4234/files/bluestacks_1_gezginler.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/level_annuities.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/wirerujezerotu.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_off00006a56.bin
2f9b688823c3c3c87b5a24ee93fbea91352c8df69dd2eb7cc7ad7532652ca684
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 5096 bytes
font_01_sfnt_off00007b7f.bin
d0782c0bbd0ff753eb0faf1abd42e29123c8fe1614be006374501bce909040f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7F 10228 bytes
font_02_sfnt_off00009e6e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6E 4324 bytes