Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8e65fac2059304…

MALICIOUS

PDF

42.0 KB Created: 2020-10-30 03:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7111aeff713d750e6bfab72dc3b80ed2 SHA-1: dd6763c52b8f0665eac8d4ea2226e27cc1aa3ae3 SHA-256: 1e8e65fac2059304d74fe6ce34855c2d61bde49dbecafb78b93d56beda456d3f
102 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL leads to a redirector that likely serves a malicious payload, aligning with a spearphishing attachment attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?keyword=movietube+apk+android+for+android
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f8ddacef0563.pdf
    • https://cdn-cms.f-static.net/uploads/4403689/normal_5f977d0f38eb9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0496/1160/4132/files/xebapubujuporeni.pdf
    • https://s3.amazonaws.com/lunojol/adoptive_rite_ritual.pdf
    • https://cdn.shopify.com/s/files/1/0484/5489/3722/files/introductory_chemistry_lab_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0483/0828/9699/files/sutuwipivifozo.pdf
    • https://s3.amazonaws.com/wuzalugiseto/40489261.pdf
    • https://cdn.shopify.com/s/files/1/0486/2335/4021/files/digugopugigarif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2903/6199/files/riwepomeb.pdf
    • https://cdn.shopify.com/s/files/1/0497/2186/8449/files/romal.pdf
    • https://s3.amazonaws.com/mijedusovineti/75053075626.pdf
    • https://s3.amazonaws.com/gozilum/kasuxapanoz.pdf
    • https://s3.amazonaws.com/gotenukevepunin/berek.pdf
    • https://s3.amazonaws.com/turip/dafopasafumetenow.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_off000063cb.bin
dc462b7b1e62fd410fd777cfe875cc6c96140f0ed90f054e6eba396f43b65e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 5096 bytes
font_01_sfnt_off00007542.bin
b448c9a26ab2db41dc47621047b67fd2cf4f5e5a09433a44f4ed69a9dbfb28bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 11676 bytes

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