Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b717ef35a9b3f68…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 04:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3caffc8b7cb83fe2ea29f25f0e801863 SHA-1: 7dfaaa0aa773195085d84db6e12649e52181ea63 SHA-256: 6b717ef35a9b3f68c905bb0793b53f6351820997a8a085a092d2d9cc08fa74b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=anand+telugu+movie+free++hd', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing movie-related 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.ru/pify?keyword=anand+telugu+movie+free++hd
    • http://xulup.1corinthiens15.com/uploads/1/3/0/8/130874113/lokuzanosafajovowok.pdf
    • http://tukib.contextualsecurity-partners.com/uploads/1/3/2/3/132303124/6092648.pdf
    • http://rawozeref.debbieyoung.co.uk/uploads/1/3/1/4/131406798/8193974.pdf
    • http://files.grandpagoose.com/uploads/1/3/1/1/131164431/caed8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/2437961837.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/convertir_de_a_word_gratis_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/62285880083.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/mefoforo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/examples_of_theme_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/dezubosezopiwipavamu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/fluid_mechanics_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2271/9912/files/treatment_of_uti_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/89915343991.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/10674725179.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004976.bin
216e015534bfe7f0a780e9e621d19679301433727e0715f0a7928679755f05ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4976 5192 bytes
font_01_sfnt_off00005af7.bin
277809ffa466412308f9facd9b44046561ec9e3ce3fb39ffc145cc5127e31cc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF7 10312 bytes
font_02_sfnt_off00007e42.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 16164 bytes

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