Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecb61d9e4c7e82b…

MALICIOUS

PDF

55.0 KB Created: 2020-08-25 23:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ad246775bdd8dd9b02646dc2fd6754a SHA-1: 16f709539e2bdd085dc79b77e8e5686fbbd49276 SHA-256: 7ecb61d9e4c7e82b7e209b3b9262451873f6299794ccfbaf57a1ecfcaac91f25
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body also contains this URL, suggesting an attempt to trick users into clicking it. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=yoga+sutra+of+patanjali+pdf
    • http://files.shopgbmp.org/uploads/1/3/1/1/131164236/lepolubazo-rufunurivofafi-wukumaxu-getavowebetiw.pdf
    • http://lusij.cacaoteca.com/uploads/1/3/1/4/131482952/xuxubores.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/wuxozaxisapusinaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/wulame.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/basic_english_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/napamegodewib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/85460217722.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/corel_painter_essentials_5.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7394/files/leveling_guide_archer_talonro.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/justificatif_de_domicile_edf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/soveborazul.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b13d.bin
f7c5c578d1e6c3135e56795d28f3c610c4b54ddccd2c3c8e7eaa529e4cae5a22		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB13D 9144 bytes
font_00_sfnt_off0000701f.bin
1de03c4bfe3fc0b54898f8deea8fd6a512ff61ad940a4ea0de40798cdcd89d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 5244 bytes
font_01_sfnt_off00008207.bin
b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8207 3772 bytes
font_02_sfnt_off00008dab.bin
ccb12b921cc3f4892411ca574dcd7cec4b4052b79f520a74119705c851c55b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAB 11188 bytes

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