Malicious PDF — malware analysis report

Static analysis result for SHA-256 768977426cf6d3b3…

MALICIOUS

PDF

39.3 KB Created: 2020-08-05 01:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba7e78d2d928595f20bda45037c2f85f SHA-1: b2033b7cc8fa2ab746269adbfa1a057f10ea363e SHA-256: 768977426cf6d3b3c1fb8435c87b86cfd0f91baa5ce12f9f36c171b249f8e65b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=wreck+this+journal+everywhere+pdf'. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. Although no scripts were explicitly extracted, 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.com/pify?keyword=wreck+this+journal+everywhere+pdf
    • http://files.joshuaroseshepherdhuts.co.uk/uploads/1/3/1/4/131437236/sidosu.pdf
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdf
    • http://files.kidsonuptherapy.com/uploads/1/3/0/7/130776225/552692bc58bd.pdf
    • http://files.wasatchwingschapterh.org/uploads/1/3/2/6/132680908/0ca753450069.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1374/1471/files/xakisix.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/46906744184.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/august_alsina_downtown_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/juxazozilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/mipasivubulogebofegepeluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/ipratropium_bromide_albuterol_davis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/100_common_english_phrases_and_sentence_patterns_with_dialogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/16969499631.pdf
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/rizifafesekut.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/it_gets_better_project.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_off000059fa.bin
2e302b92fcc1a39698897cc4c03cec6715d36eba17cc5f8a6a26537011ce951f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 5652 bytes
font_01_sfnt_off00006d58.bin
d0f7eca3b75788aba6cf3a684769d7c0bd2671778f95e66c359677a4f0707cb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 10260 bytes

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