Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf2267a6a1eb7cf…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 13:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 464f99aadcfaa73fb7eab8cab93809d3 SHA-1: 41cf27784f2a7b9bf7c7fcc776d4ff66c093980b SHA-256: 6bf2267a6a1eb7cf6942933083c912316665d9f8b9f6233af47fc7bb9ce72f64
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and URLs, including a direct link to the malicious redirector, suggesting an attempt to drive traffic to malicious sites. The presence of numerous PDF links indicates a link farm strategy, likely for SEO manipulation or to distribute malware.

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=etika+utilitarianisme+dalam+bisnis+pdf
    • http://xebanoru.todpardon.com/uploads/1/3/0/8/130873947/werukabovuz.pdf
    • http://files.jdmwebsitedesign.com/uploads/1/3/1/8/131856374/buluzodipobexunu.pdf
    • http://files.theequestrianarenastore.com/uploads/1/3/0/8/130874026/6871939.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/12136194426.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/gitab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/45619050629.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/buku_bakunin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pizejop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4338/0631/files/wand_of_cure_light_wounds_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/zajukukuvakugivurud.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/dagiresoxifivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/21832232932.pdf
    • https://cdn.shopify.com/s/files/1/0435/3546/6655/files/mutunebaretiki.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/kobuluj.pdf
    • https://cdn.shopify.com/s/files/1/0438/2500/4706/files/act_math_practice_test_with_explanations.pdf
    • https://cdn.shopify.com/s/files/1/0444/4468/0359/files/calendario_settimanale_2020_da_stampare.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_off00005d6b.bin
5ea1af6739cda568d93090875c8c1c6f52e73f5e0f5a6d31692371b534cad30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6B 5348 bytes
font_01_sfnt_off00006f78.bin
6c74a8eecc0ba575ece7a9f64ee74b394556030aa3cd852792108766a6bddcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F78 9488 bytes

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