Malicious PDF — malware analysis report

Static analysis result for SHA-256 e326823c59a8d87a…

MALICIOUS

PDF

43.4 KB Created: 2020-11-01 07:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: caa2e7fb73ec89a84756fd62f518ca4b SHA-1: e6f7645fd944c4021a3459899eaeb2d973ec5b5c SHA-256: e326823c59a8d87a9234c37c31da503d3a5e969f31b054ac71d25dc5664ec743
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a link farm designed for SEO manipulation. The embedded URL `https://cctraff.ru/123?keyword=gifts+for+sister+in+law+wedding` is flagged as a malicious redirector, likely leading to a phishing or malware download site. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its role in the attack.

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/123?keyword=gifts+for+sister+in+law+wedding In PDF document text
    • https://lugeluwad.weebly.com/uploads/1/3/4/3/134328935/2981842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazutun/anomaly_detection_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/gifepipiwupuxigaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/aromatic_compounds_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6066/3746/files/worksheet_on_preposition_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/kenmore_series_500_auto_load_sensing_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/ibps_clerk_syllabus_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/adobe_acrobat_pro_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6651/9463/files/tufodiduleviwulikazej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 5200 bytes
SHA-256: 92b6226254c2396ebcf306ba5031b182a51d33f7175adfdfaa6d79a7fd2146d5
font_01_sfnt_off00007c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C41 11040 bytes
SHA-256: ad8841af654638a6d1d48b0bbb21d397d71dc4faa0d95c1b4db3149509fd7729

Open this report in the interactive analyzer, or submit your own file for analysis.