Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae000a0282131821…

MALICIOUS

PDF

43.5 KB Created: 2020-11-07 07:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9caaef51da6177a11bf9c00303b8aabf SHA-1: b5e152cac03e5127547b9750c6c73cb1a5e16dfc SHA-256: ae000a02821318216d4935fcc13e5c566a66c8b31f36f241590b17171bfdd6b5
192 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests the file is designed to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/aws?keyword=list+of+ch+words+speech+therapy In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/34503f2f-dfee-4034-8099-fc0d96a75603/9043944422.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/robirixaki.pdfIn PDF document text
    • https://monirasuwa.files.wordpress.com/2020/11/33363284578.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/kaxumumu.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/the_longman_writer_9th_edition.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/50939477702.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/distant_worlds_universe_2_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/7363756497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d401fd-c2f5-48be-9372-8dde5b6d25b2/4156558247.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/39736227537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578e5304-76d7-497a-b1d9-f93ebb45054e/modulo_23_semana_4_fase_final.pdfIn PDF document text
    • https://xarewexupi.files.wordpress.com/2020/11/gitaxoxukujuwogababaxer.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/free_printable_ged_practice_test_2020.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E08 5028 bytes
SHA-256: 2d181b0f0465524e8e23d30cee6a548bd7f1de6502f16276dfacd988ff5c8f45
font_01_sfnt_off00007f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 10268 bytes
SHA-256: b21b05dd4134ed3e23eb66aba18f089339f3bfcd431a6cf5c45d94ac0aa46202
font_02_sfnt_off0000a24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA24C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333