Malicious PDF — malware analysis report

Static analysis result for SHA-256 0903e60568825053…

MALICIOUS

PDF

43.6 KB Created: 2020-08-25 19:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bb7e74044843929e3bbd1fd58b85a99 SHA-1: e9a25840cd006f38008695dc59204fd44c0127fa SHA-256: 0903e605688250539f9a934a9e95e2065df0dc2feba9e0ee6bf5096e524690e4
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL pointing to a malicious redirector and several other URLs that appear to be part of a link farm. The presence of a password-protected archive lure suggests an attempt to bypass security scanning by encrypting a payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=kandinsky+rouge+jaune+bleu
    • http://files.paradisemomentzskin.com/uploads/1/3/1/4/131407549/vuzakurudi-pifega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/bavexofebajijonef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/final_cut_pro_x_templates.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/mejubib.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/hedwig_s_theme_sheet_music_violin_printable.pdf
    • https://cdn.shopify.com/s/files/1/0437/6546/5245/files/9147178317.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/aprendizajes_clave_secundaria_historia.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/mumupetabegigexejabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/oxford_bookworms_library_stage_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/wuxejaxawofiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/3846/5435/files/kufosulebofip.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_off00005f9b.bin
69a0c62de3ad971a38a200072fe474c20edc176a2950fe29857f981b2d3d90d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9B 5148 bytes
font_01_sfnt_off00007125.bin
0094739b4651030a86651a221396b17a86f0b8016a4a87d41e7c39e580034198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7125 10172 bytes
font_02_sfnt_off00009404.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9404 4324 bytes

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