Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffbfe2484bd2572…

MALICIOUS

PDF

64.8 KB Created: 2020-08-06 20:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1d49de7377c79302f3294aa5349c2a2 SHA-1: d1fed82166d5dc7afef06da7718dead077ddefa5 SHA-256: 3ffbfe2484bd2572fc4b1e0c4887769eb15f51e76c089ec0a7b3b497420b0048
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Tintin in the congo color pdf download' and the authoring application, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely part of a link farm to improve search engine ranking for malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=tintin%20in%20the%20congo%20color%20pdf%20download
    • http://files.operativedentistryturin.com/uploads/1/3/0/7/130776073/6193678.pdf
    • http://files.authoraprilkelley.com/uploads/1/3/0/8/130873791/gewixikalutad.pdf
    • http://files.hannahwebster.co.nz/uploads/1/3/1/3/131384359/5552383.pdf
    • http://files.alexaelizabethdesign.com/uploads/1/3/0/7/130775431/d0ff95e85fb09.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/vimekuwevifotikudetene.pdf
    • https://cdn.shopify.com/s/files/1/0439/8091/4846/files/mapenufurufanabifupazugor.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/45239573739.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/75416653537.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/baritomosep.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/pengertian_bioremediasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/protein_synthesis_process.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/52690751154.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/mimelajenenaxavamokokine.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/roskam_airplane_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/vifuzoxobivu.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_off0000bf43.bin
c000a9381ff91e3c7339ee36b70ba477035e5c5f413ad6200f4897c9c823ebe5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF43 5280 bytes
font_01_sfnt_off0000d147.bin
428b2731a1c35b5d3a8d0ff04f27b99b21b77e2756c3bdb72d43e254773a6183
pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 10732 bytes