Malicious PDF — malware analysis report

Static analysis result for SHA-256 4003e17ad18e2691…

MALICIOUS

PDF

46.8 KB Created: 2020-10-02 09:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7fcf909bda98af64f834ce404efd6a99 SHA-1: ebfa085bd8b441bc20cecc6ea3671eaaca4e8a1c SHA-256: 4003e17ad18e26912d70e573284ad56256ff6c01768401943ee91d3029505b38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/pify?keyword=prison+notebooks+pdf', which is also listed as a malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing.

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://gettraff.ru/pify?keyword=prison+notebooks+pdf In PDF document text
    • http://files.duettechnology.com/uploads/1/3/2/6/132696263/8500dd3806baef1.pdfIn PDF document text
    • http://files.pharmaciecocagne.ca/uploads/1/3/1/4/131406800/631e17c148940.pdfIn PDF document text
    • http://files.berrybrook.us/uploads/1/3/1/3/131380388/8070684.pdfIn PDF document text
    • http://files.sharonmaylinn.com/uploads/1/3/0/9/130969774/3376484.pdfIn PDF document text
    • http://degerimi.fishingboatsontario.com/uploads/1/3/1/3/131379856/zujef_gabudipuwi_pejureti_seranaxejevike.pdfIn PDF document text
    • http://ladal.jamesnehring.org/uploads/1/3/1/8/131856491/623ac327cfb.pdfIn PDF document text
    • http://files.allnaturalservices.com/uploads/1/3/0/7/130776279/8907378.pdfIn PDF document text
    • http://fegugum.boscobelfarm.com/uploads/1/3/1/8/131871816/728fcf58.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/segizakatir.pdfIn PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/92095644953.pdfIn PDF document text
    • https://site-1040286.mozfiles.com/files/1040286/titizekilorirufagoxutawor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/sincerely_in_french.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/atlas_de_geografia_del_mundo_5_grado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1546/3327/files/vakawonugiwawari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/73746045503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9882/4597/files/11131286271.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 4996 bytes
SHA-256: c854fb1bc4ac2178f9b3bd8b56d08d3de575703707cdc62e32c5728078ef8910
font_01_sfnt_off00008a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 10364 bytes
SHA-256: c81992d617e576a5b4aad5ca2b592746f4f804615f920ac47854d88f20ae113f

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