Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d00c7d6c1dee60…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 20:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71bd52f422831245856e34504952c707 SHA-1: d3b94e585183800e1ffece4a157fb031b02d4eac SHA-256: 83d00c7d6c1dee607d51c3ed437585438ba082c0c066274194b18d021721c7e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though obfuscated, contains the same URL and references to benign-sounding content, likely as a lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=boney+m+greatest+hits+album+free
    • http://files.jimmydebutts.com/uploads/1/3/0/8/130874416/c2ac8f83c9.pdf
    • http://files.randolphcountycd.com/uploads/1/3/0/7/130739850/1042142.pdf
    • http://duzekin.2ndchancebailllc.com/uploads/1/3/2/6/132681670/ec5d522e2a.pdf
    • http://molar.pozdolcounseling.com/uploads/1/3/1/4/131438225/jidaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/72918503185.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/63549997839.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3398/files/86853193328.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/95334800817.pdf
    • https://cdn.shopify.com/s/files/1/0430/8346/4855/files/beaglebone_black_wireless_schematic.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/pdf_file_format_basic_structure.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/93409350935.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7288/files/doxomujodewa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/medial_epicondylitis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/gizulakotozami.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/30201492388.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/78389886386.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/baliwodagazuduruvosebujog.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/car_rental_application_form.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_off000054b4.bin
61017abdb60bdf4cb874c25a66ebf78984adcd1db251e37eeb6f9157c0422baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B4 5352 bytes
font_01_sfnt_off000066bd.bin
91c51dbd873189426a62e52102feb6cc6062e941cd33e8524e73be973b67fdca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BD 10232 bytes
font_02_sfnt_off000089da.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DA 4324 bytes

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