Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ad22ee1f184ec1…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 20:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6734e3f45d7d90e1672a8544902b34d6 SHA-1: cd90923029f0eb3e1e974fb0a869e2a893f71fd8 SHA-256: 04ad22ee1f184ec1dcec2ca0dd97264b87dbc73f573cc661ba1805472f95ba74
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a primary malicious redirector URL, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the primary malicious URL and references to other benign-looking PDFs hosted on similar domains. The presence of numerous external links, many pointing to PDF files, indicates a link farm designed to manipulate search engine results or distribute malicious content.

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.cc/pify?keyword=online+translator+german+to+english+pdf
    • http://files.mcalpine30days.com/uploads/1/3/0/8/130873783/kenupogiko.pdf
    • http://mogevomu.2-naturalsisters.com/uploads/1/3/1/4/131453133/3828244.pdf
    • http://files.beaunest.com/uploads/1/3/1/3/131380966/xikemagolazemubisa.pdf
    • http://kowumux.mwdentalanesthesia.com/uploads/1/3/0/7/130775519/xisarumimexipivoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/64418949540.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/medicina_regenerativa._clulas_madre_embrionarias_y_adultas.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/78059192281.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/vabuwukilufuregufefuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/a_level_physics_pdf_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4341/files/88670647312.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/57874285616.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/83658050389.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/69698619179.pdf
    • https://cdn.shopify.com/s/files/1/0435/9864/3363/files/90881085630.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/97365209328.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/rspec_vs_cucumber.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_off00006aea.bin
b09403f8606c069448fac2737b48eb2727c75b84b519fd44f31cc60720f8870c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEA 5484 bytes
font_01_sfnt_off00007d62.bin
758d5199c61d5b61c1bc0a9dda23ec7f6610719cce5049492eb0770dbed13753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D62 10128 bytes

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