Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1af89717792651…

MALICIOUS

PDF

63.0 KB Created: 2020-10-28 05:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b6331019d1bd071dd8bd914d1286a476 SHA-1: c66a2ec50c607b0e7671e3341c07b3f113de5482 SHA-256: ab1af897177926511371bc46a4e3102157f9ad8581f7d23fc7af61a0a7396b9e
194 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to malicious infrastructure, specifically `https://cctraff.ru/pify?keyword=super+robot+taisen+og+2+rom`. The document body, though heavily obfuscated, also contains this URL, suggesting a phishing or scam attempt. The presence of numerous links to external PDFs, many hosted on striking.ly and S3, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted, but the primary attack vector is the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/pify?keyword=super+robot+taisen+og+2+rom In PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/manelol.pdfIn PDF document text
    • https://pakezumada.weebly.com/uploads/1/3/4/3/134368128/2812161.pdfIn PDF document text
    • https://kanexala.weebly.com/uploads/1/3/4/3/134374151/5352872.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/pobenirabexu.pdfIn PDF document text
    • https://jirewolekaza.weebly.com/uploads/1/3/4/3/134387643/57909e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d195901b-0f06-463e-837e-08c11f4f93bd/82039346786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6489f897-9d2e-417b-bb69-b1485387df09/iphone_6_se_case_with_card_holder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad640b7-5cd3-4a6c-b1e6-0a88dce711ac/17720686493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8331270e-3993-44e1-bb0a-7cdc9daf8f0f/rival_steamer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/23714533689.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/21936333370.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/effects_of_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/cost_and_management_accounting_short_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/les_analyses_biologiques.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/kiwebujawulebeteraladasuk.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/agropolitan_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/attack_on_titan_volume_22.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/buwodizodizerijomo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D47 5484 bytes
SHA-256: 308cfc295e11a4ecb13082995711c445a08c79f550866d0b7c3b1ac294516f24
font_01_sfnt_off0000afd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD2 11560 bytes
SHA-256: f51f4c70f9c381c9a785032854cd8daed50c42e01f42b0b05f21987949ce036c
font_02_sfnt_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 16560 bytes
SHA-256: 7f1bfd700ba892b3a535d7133796049f58741f5a7be4d8edcf3e4d41896e0d16