Malicious PDF — malware analysis report

Static analysis result for SHA-256 c593ef2c5a141b4d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-13 16:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c00c819ded5a9879c6e5365ff0ed207 SHA-1: c51ae3803053803bad44e8c7b537af52bd78fc05 SHA-256: c593ef2c5a141b4de339cdd917e30c4a556e7303fcbc719ec6cdef6c7c95cf62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm with numerous external links, many hosted on Shopify, suggesting a potential SEO manipulation or content distribution scheme. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=jesus+de+nazaret+benedicto+xvi+pdf+gratis
    • http://files.brownstone-canberra-ec.com/uploads/1/3/1/4/131406544/8e8a7e0625.pdf
    • http://xuwegisej.spiritconnections1.com/uploads/1/3/1/0/131070109/gesidodelikixiv_fizexepexelobos.pdf
    • http://files.gemalchemist.com/uploads/1/3/0/8/130874633/sezepexifurisitalaz.pdf
    • http://rudosaz.okto8online.com/uploads/1/3/1/4/131453114/5290412.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/38020799799.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/bodazorosuretil.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/behaviorist_theory_of_second_language_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/96188182377.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/navaxituxulukerepal.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/antioxidant_activity_of_apple_peels.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/19857407725.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/karazawakuwujolowofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/73677374676.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/bobina_toroidal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/56457602043.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/galubik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/4846982201.pdf
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/blank_space_song_lyrics.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b80.bin
e488f74b170486c0cac95bc8248ea1c1a398eed0cab061fb25153290acac4d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 5600 bytes
font_01_sfnt_off00007e9b.bin
6a3570fb162d7e59deea5cf503b7bee5f6eb13ac6a4703d769683ecb5f8d90d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 13356 bytes

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