Malicious PDF — malware analysis report

Static analysis result for SHA-256 07477f0916cc888b…

MALICIOUS

PDF

37.2 KB Created: 2020-08-09 14:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f06d4e5e40c1cdf4e4736333ccf74f0 SHA-1: 1ad7ca861232d3e7d935a077a82d4ea5a7d6c790 SHA-256: 07477f0916cc888ba83010bdf06166c90ddaaa71d38876810c00ba8056d653c8
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'libro emociones y aceites esenciales pdf'. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a tactic to distribute malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

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=libro+emociones+y+aceites+esenciales+pdf
    • http://files.songbirdhealingcrystals.com/uploads/1/3/1/6/131636946/2b9888b.pdf
    • http://files.stevemullins.org/uploads/1/3/2/6/132681931/3142585.pdf
    • http://gitenex.shieldedhearts.org/uploads/1/3/1/4/131453870/2496b8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/96738326452.pdf
    • https://cdn.shopify.com/s/files/1/0435/8697/7949/files/97784047040.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/bupibuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/nikuxisiwilij.pdf
    • https://cdn.shopify.com/s/files/1/0437/3741/5829/files/buxejujikoxitunezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/82339038156.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/govukutezojipibasadi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/85711803625.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/20464684874.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/83374016031.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/jotevopovog.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/90251875209.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_off00004ef8.bin
9f44328e8914a8d4a964a2ed611ef3c20e8cda2c2c296d6a7b63e0390dd55470
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF8 5484 bytes
font_01_sfnt_off00006192.bin
f476713e4987bd1eb4ba6b196a8890057b5abdc62db64dc588bbf825d1a2dec7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 11260 bytes