Malicious PDF — malware analysis report

Static analysis result for SHA-256 65573466a6bcbc06…

MALICIOUS

PDF

51.3 KB Created: 2020-09-10 01:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6400610b4284b3ea4c3a1ce4317647b1 SHA-1: a7ff50ab4040650f6e137f825e20012e51aac754 SHA-256: 65573466a6bcbc06360dffce8dea0e1b5ea025b2d415987ccd797cdf34ef8846
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though obfuscated, contains text related to a 'farming guide' and the malicious URL, suggesting a lure to trick users into clicking. The PDF_SEO_LINK_FARM heuristic further indicates the presence of numerous external links, likely part of a link farm designed to attract traffic.

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.club/wix?keyword=fgo+ccc+event+farming+guide
    • http://nawobogov.harvestandplate.com/uploads/1/3/1/6/131637014/827321.pdf
    • http://wepif.davidsclassicalcds.com/uploads/1/3/2/6/132681865/paxuvazili.pdf
    • http://files.clcem.net/uploads/1/3/0/7/130776655/8414fa242.pdf
    • http://jenolife.mandokidslearning.com/uploads/1/3/1/6/131607062/jojerasiwefaris.pdf
    • http://buwaxun.liquidnitrogenphoto.com/uploads/1/3/2/7/132712336/3e6f135d76c7cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0e9fc2_8c4bbb7abab9463699485cf673775bdc.pdf
    • https://static.usrfiles.com/ugd/529385_0a4c030385b84ec98ebc25afd9191a24.pdf
    • https://static.usrfiles.com/ugd/18f527_3d2d4a13f37247b3b3609c0c113e64a1.pdf
    • https://static.usrfiles.com/ugd/18f527_06dffb5fa7324bb9b359f4b67e7dfb12.pdf
    • https://cdn.shopify.com/s/files/1/0462/3892/4960/files/fafsa_signature_page_2017-_18.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/sqlite_insert_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/fuvedubowozadupuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/gutujojuguti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.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_off00008ae2.bin
0157026b1e18426e566cfd3356407841d4533af9acbf5cf0f41590f4d62549a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 5148 bytes
font_01_sfnt_off00009c61.bin
8ab140de581894859141587e296b7260dcdaaf965343850b048b8c8ae7b84004
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C61 10588 bytes