Malicious PDF — malware analysis report

Static analysis result for SHA-256 614dce54daac2390…

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 07:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6d23592e52a391f304870f66253ca5a SHA-1: d0616abcee0b4924867c0d4f1bfe10083f03e3ed SHA-256: 614dce54daac23903b0261f09d3864e83ed738070a2e8ba20a43f4fa674388cb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a product review and a URL that appears to be part of a link farm. This suggests an attempt to trick users into visiting a malicious site, likely for phishing or malware distribution.

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.ru/wix?keyword=sainsburys+combination+microwave+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/12f4eb_04c664a75d4a4049a6661ecc6b1ed9e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_81a1a1ea9071436fa46061a6bd567d35.pdf
    • https://static.usrfiles.com/ugd/c068f8_db09f2c14fed45cca46fdcd7744a407f.pdf
    • https://static.usrfiles.com/ugd/16a96a_32cd861d5bbe40c3a336da9ba540c1ba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/jobokajenesojopolubijet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/dmtech_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/13209374889.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/zelagekubipuwujugeremoki.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/los_valores_y_antivalores.pdf
    • https://static.usrfiles.com/ugd/b8c837_3344b4bb45944211a8dbb4d1fccaef30.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7b2be44753840888bbca63315dc089b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a586055689a44ff191ed48523f317cce.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f42116102f64ca3866508ef0553202b.pdf
    • https://static.usrfiles.com/ugd/225520_30ac585d9baa47cf83b6b0da3883f677.pdf
    • https://static.usrfiles.com/ugd/b8c837_92c89f0ed4484e788e34c4f08e9f3aa5.pdf
    • https://static.usrfiles.com/ugd/a107db_ed4c1e2412994c16ad406ceb9fa66064.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_off000072ab.bin
8fe658fbaa65aef9d011bbbe4a1399186a0ed9014e8a665d765bd5083ba78fd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AB 5408 bytes
font_01_sfnt_off00008508.bin
c25c3fa67100b44ad2ceba5ec09bfb6ef1f09bbd8aa8ecf96a7a8c6b6259e390
pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 10816 bytes