Malicious PDF — malware analysis report

Static analysis result for SHA-256 003805732c4be179…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 10:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3aa82d611fd2f7b9c2cc60ec97bd5a8 SHA-1: a5d5b315c49ca4dd43e7f90696957d68cd125413 SHA-256: 003805732c4be179d822e10ff10664829f45be77b14138a7f38e61fd1b31b4b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and text related to 'bottle feeding a breastfed baby pdf', suggesting a lure. The presence of a large number of external PDF links, many pointing to potentially malicious domains, indicates a link farm or distribution mechanism.

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/wb?keyword=bottle%20feeding%20a%20breastfed%20baby%20pdf
    • http://files.charhdof.com/uploads/1/3/2/6/132681317/4727078.pdf
    • http://warukol.gowildworkshops.org/uploads/1/3/1/4/131453645/6cbe7.pdf
    • http://files.killjoy.info/uploads/1/3/1/3/131383456/bbc888493755.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/61442648091.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/60850014337.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/91134522466.pdf
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/jofutafag.pdf
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/bubulis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/silalilobaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3408/files/najugiravaripap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/biology_class_11_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/32755951333.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/xulawugexilujegutatikot.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/4200953274.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/35981075540.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/high_school_book_report_template_free_printable.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_off00006b46.bin
c0803160e620ecf24897350d43e8e1ccdcade58c337afe5d133c71b50d7bcb30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B46 5500 bytes
font_01_sfnt_off00007e11.bin
83e99acd90f4229571cfb85df57b664fae38bb642ac16ca0b8bb8be61364426f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E11 9896 bytes

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