Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffb8b2570f43666…

MALICIOUS

PDF

40.5 KB Created: 2020-10-30 21:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc6d0087976280cb302184230b142c42 SHA-1: bb866b642b4dd207fee8026a05e3114d7b8edfb8 SHA-256: bffb8b2570f43666064cf68b31d8ebb986ac1e5dc77b1a5eb5da6e35f5af246e
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector. The embedded URL `https://cctraff.ru/aws?keyword=manual+de+usuario+nissan+sentra+2000` is the primary indicator of malicious intent, likely leading to a phishing or malware download site. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/aws?keyword=manual+de+usuario+nissan+sentra+2000
    • https://wofexexugov.weebly.com/uploads/1/3/4/3/134318452/balariwifefomasesimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0500/3912/8263/files/powerdirector_pro_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0484/8720/2971/files/magic_e_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0506/5667/3979/files/akuvox_r15p_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0498/7669/7246/files/web_development_in_python.pdf
    • https://uploads.strikinglycdn.com/files/094e5766-ba91-405e-a01b-1e3432533bed/craftsman_riding_tractor_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0493/6695/8239/files/dixarimu.pdf
    • https://s3.amazonaws.com/bejenosugede/wiposurune.pdf
    • https://s3.amazonaws.com/jakujakula/94703238487.pdf
    • https://cdn.shopify.com/s/files/1/0484/2451/7790/files/dionex_ase_350_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/b64b37cc-9810-4dd6-859e-fd7a6ec7f685/64738946974.pdf
    • https://s3.amazonaws.com/tawosutosuxi/all_type_of_application_format_in.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_off00006142.bin
98fb36555acc2a1eb75b2d92dc59fbb9bb86e9bdf22db694c951e371e7cdb81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5096 bytes
font_01_sfnt_off000072ab.bin
069a55069f11a90f832eb9e1437569d1e4ac750e6ce601235b8f440b65ad6b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AB 10304 bytes

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