Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d7d4f7a6a997ab…

MALICIOUS

PDF

66.9 KB Created: 2020-12-21 02:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 171a4b29fe47d615a17e118f180cba9a SHA-1: 09bf51baa983409d0381d6cae647fb1fc13e0e17 SHA-256: 97d7d4f7a6a997ab3e7a0cd6cdfb6f6c970860fff92d04dd6bd2591fdb169761
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector infrastructure, specifically 'cctraff.ru'. This redirector is likely used to obscure the final destination, which is probably a phishing page or a malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/wb?keyword=weather%20today%20chicago In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fd948428758f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5faf4d4120594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_5fb41b5d07993.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/jumedemimo/17822876975.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/antivirus_smadav_terbaru_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/77291071978.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/60208678591.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e77e5c7695ca9b771ca/t/5fc689ff2dd96f5918d0bec2/1606846975947/91610367153.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/bar_louie_menu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3099a92c50b1a1e857bd1/t/5fce2f02fe657040d5bc33cc/1607347972553/bixijimodonobetopavivi.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/dylan_s_unblocked_games_vex_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd391cd610986319751208/t/5fddae90a3b92b153c1218ff/1608363666019/free_bootstrap_admin_template.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96A 5104 bytes
SHA-256: d34e27f63682e16b4abe2ae626c2ef3628af4d17d27479c4b3de66f91614b830
font_01_sfnt_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 10604 bytes
SHA-256: 4fc18887a25e50ac535bb099bf3ca22c743ce635602fc2d963b8af695d28e989

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