Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd302f6b07ff172…

MALICIOUS

PDF

43.9 KB Created: 2020-09-08 11:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df745320ade7abdb8aa7dc63b3e10f5 SHA-1: 7014b838976481dd95043a76fdf91f5dfc2565bb SHA-256: 5cd302f6b07ff172250e7e1db941b93a929ec39eb246e87002b8a1557b103df1
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body text and a heuristic indicate it's a fake invoice lure, designed to trick users into clicking the malicious link. No scripts were extracted, but the presence of a malicious redirector and the invoice lure strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/wix?keyword=commercial+invoice+template+usa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/surizuvevabunanufil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/convertible_dress_style_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/jezusevoreles.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/solaxanufugibamajovapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/sogaxem.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/838780348.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/super_minecraft_maker.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/material_catequesis_de_primera_comunion_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/89774280460.pdf
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/bhojpuri_song_video_mp4_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1761/files/nabucco_overture.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/cantina_band_sax_quartet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/rumudasagovabanemafi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/46304346175.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eda.bin
b9c004cd36a16795098498ca4084ab3624357287eaddb88908ebc654f4f318e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 5044 bytes
font_01_sfnt_off00007fe7.bin
abdbe5e2617217ea8f62054b4fb78afac8829345d801ca93a0324df5ad628b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE7 10340 bytes

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