Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d716ef29a894092…

MALICIOUS

PDF

41.0 KB Created: 2020-08-22 17:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e75c93cbe67ef44e98825daf1f072bce SHA-1: ff8c2bef2a0acc6ee9e9452c0928cadad03feb9f SHA-256: 9d716ef29a894092bbc64ba54da4e15b5f0de0939c5d98f1f3e4998b91e2da28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=answerable+over+definition. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to lead the user to malicious content, likely for phishing or malware distribution.

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=answerable+over+definition
    • http://files.jaxjacobsen.com/uploads/1/3/1/4/131438071/mikar-nerotizizelel.pdf
    • http://verabiza.jlizjewelrynmore.com/uploads/1/3/0/8/130874429/18ac78b8da.pdf
    • http://raxuzij.ckc3.org/uploads/1/3/1/3/131379594/tejobalunira-beboli-lofut-jeketovat.pdf
    • http://files.southwestcactusshop.com/uploads/1/3/1/3/131383821/66ff16bb4c07b6.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/31475981747.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1477/files/19343412232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/93742059696.pdf
    • https://cdn.shopify.com/s/files/1/0462/3810/5760/files/medical_laboratory_technology_career_investigation_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/1898/4352/files/eduardo_galeano_el_futbol.pdf
    • https://cdn.shopify.com/s/files/1/0448/4546/5762/files/financial_statement_template_xls.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/59310570469.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/zopuriwewinomi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9820/0481/files/51689964766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/nobuto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/14537367382.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/mugaviwiboli.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/super_mario_64_wad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/benefits_of_entrepreneurship_education.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_off00006067.bin
5fe5c009862d3f4ff79f63de82087d28524249369117a1b6eeeac53781c41590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 5180 bytes
font_01_sfnt_off00007222.bin
9dee5b205fcba7a871298d7771f32761b8ded9b20dbafd093981dbb57af40803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7222 10588 bytes

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