Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d5c20f622b03e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 11:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f70aac3ae923bced9955163a5220373d SHA-1: e6d8c2f2c37b7436c67b7d13ce54599a75f588e2 SHA-256: 612d5c20f622b03ed8b45bd3d92594f5f477d1ee894cdb9c59aba2b107deb84e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=visiting+card+design+online+free+editing', suggesting a lure to a malicious site. The presence of a large number of external PDF links further indicates a link farm or redirection scheme.

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/pify?keyword=visiting+card+design+online+free+editing
    • http://xobex.artvenya.com/uploads/1/3/2/7/132740805/sazesibesiz_delomefe_datiwujupi.pdf
    • http://files.sevenwindsfarm.com/uploads/1/3/2/6/132696483/dilazisetogamomega.pdf
    • http://files.coolanniestravels.com/uploads/1/3/0/9/130969300/pojumawobafiki_kosululoba.pdf
    • http://files.pros2gogolf.com/uploads/1/3/1/6/131637714/zowimagebunukevete.pdf
    • http://samemeze.sippicanchoralsociety.org/uploads/1/3/0/7/130739220/684bed0fe972434.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/27590272610.pdf
    • https://cdn.shopify.com/s/files/1/0438/8113/6296/files/python_format_sql_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/easy_english_grammar_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/all_devotional_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/pojosejuzagoguvisejowajaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/87625196217.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1589/files/arduino_programming_language_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5692/9687/files/zojorixisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2163/files/cv_automatisme_et_informatique_industrielle.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/47073257433.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_off00006bdf.bin
75d668669ffd8a63834f5665314f50ccd0cc5aafc2842ba41341d09ef1904bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 5156 bytes
font_01_sfnt_off00007d6e.bin
32a4c73301586e0754ce3f19cb27bc5a07447979b6ebcd842449987f8b3b6bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 10024 bytes

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