Malicious PDF — malware analysis report

Static analysis result for SHA-256 1366a53e448a5995…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 23:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db25ccd573017e1f4504442a960f8dd2 SHA-1: f4baa3e369b427bdd7c02a5b42f34d0f5c04c712 SHA-256: 1366a53e448a5995b7462d98d07a520ce84b6ec931991606cb777106651e06ed
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a spectrophotometer manual and the malicious URL. This suggests a phishing attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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/wb?keyword=shimadzu%20uv-1800%20spectrophotometer%20manual
    • http://files.holisticblendssoap.com/uploads/1/3/1/4/131453574/7b8cbc5.pdf
    • http://files.unfiltered-anastasia.com/uploads/1/3/1/4/131453633/6563354.pdf
    • http://files.transformationalbodyworkniagara.com/uploads/1/3/2/6/132682293/seronazurawibosazope.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/baal_veer_2_mp4_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/30082354235.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/lafalekimol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/jegojuwegigepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/62632873166.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/kaguriwevemelidovudolupib.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/catholic_church_history_timeline.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/bugupepanezuro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/2192794337.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/nanedevipipoxawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/verbe_etre_et_avoir_au_futur.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/wilosa.pdf
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/top_500_companies_in_south_africa.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_off00005db5.bin
7a3844c7a4be6c7183f584b5c3af7be9a55da339863153a1a5cfb4d362baa41d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB5 5944 bytes
font_01_sfnt_off000071d8.bin
250d0d4ecffd9af2af073eb1b5b63cebf38b18413688e5bdaf7c17feb657f15e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 10408 bytes