Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f54377404150a3…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 22:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86270fc7164b99fe45c86079e842f124 SHA-1: f072ba72a5edd502d6e50d0c6006827503f77d3b SHA-256: 63f54377404150a3d5417c958aae023401c640dd3761e0fd94de9389abc1b53d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of a link farm further indicates a malicious intent to distribute malicious content or manipulate search engine results.

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=21+cfr+part+11+validation+pdf
    • http://files.m2maxsolutions.com/uploads/1/3/1/8/131860378/6583fe.pdf
    • http://files.naturalbirthingjoy.com/uploads/1/3/2/7/132712209/0c947eaca0.pdf
    • http://kilunixi.michiganmajors.org/uploads/1/3/1/4/131407227/6692412.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/juxaloxemegipumudufip.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/novubogaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/83138592343.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/bandaging_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/totazowefematuzisusubew.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/30674654276.pdf
    • https://cdn.shopify.com/s/files/1/0436/7758/1465/files/xenitebupunuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/81982251066.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/massage_therapy_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/personal_pronouns_english_exercise_pdf.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_off00006aee.bin
93feaf1cbc4965553bf9ec2575c389625fbc4388108007251ee1aec3e27d9319
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEE 5120 bytes
font_01_sfnt_off00007c68.bin
6c9df3bd568a25819eb0dd4aecc47b70a7a403d751f762ec7da1abb8914b537a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 10076 bytes