Malicious PDF — malware analysis report

Static analysis result for SHA-256 0081d0837eb58371…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 16:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fbdc30d3f96fbd307ad2592cf83dd15 SHA-1: 0db5969907192fb3b02d3c6b6cfa5427ee24645a SHA-256: 0081d0837eb5837186084195ed5771b422be5df3f4fdf4d85bd0697c99559a3d
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, likely to trick users into downloading or executing further malware. The document body and heuristics indicate a lure related to software serials, which is a common phishing tactic. The presence of a link farm further supports the malicious intent.

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/wix?keyword=cs6+master+collection+serial
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6832/6042/files/manenesotepit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/6234072372.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/bakatagafota.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/kabixilakorovew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/english_words_with_meaning_and_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/john_deere_445_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/xabagedekurukuneduvesuluk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/fodil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/bobcat_s300_specifications.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007138.bin
194b4d460526fcb7c497dd6934a6146bd5940fb45a343f3fa8331f2cef41a914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 5004 bytes
font_01_sfnt_off00008214.bin
2c9dc4cd20ff26ff297ab77b45686c266ce0f753805736842d5a9a1e3d6c320f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8214 10956 bytes

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