Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b6d1cbd7958625…

MALICIOUS

PDF

73.9 KB Created: 2020-12-17 12:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b8b8c5af050737d507f8582958bfa30b SHA-1: 03a6d2ba93ca2acc191576513c30a599637e1613 SHA-256: e9b6d1cbd79586256a93e0d55c28f235a6602dac7c9497bc00408caa1343ac08
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it's a malicious redirector link, specifically pointing to 'https://gettraff.ru/123?utm_term=3+chlorine+tablets+50+lbs'. This URL is associated with phishing and malware distribution. The ML classifier also strongly flagged the PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL strongly suggests the document's intent is to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=3+chlorine+tablets+50+lbs In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_5fc9a67dc6774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366063/normal_5fcba90b8b8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fae6463e6240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fc511782c05a.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/93cc9c58-02b6-4a81-ba14-4d6c4c6229ce/37926007289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e634b31a-80c6-4f2d-a5a2-3182f1a022f3/prison_break_light_downloads.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/third_party_transformers_masterpiece.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a83c625-68f6-4ae7-ae84-c685625f6cfe/guitar_finger_picks_guitar_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9a216a-2574-4d2f-8ee6-908dbd85ab32/fepedemaweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90c3c94-5c72-461c-9f8f-5c632781e28f/pop_culture_trivia_game.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 2

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_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 5360 bytes
SHA-256: 5b0e81d0a3433161b35f9aca949001e3651ed1271f375ee7d82c3f14ee599d41
font_01_sfnt_off0000f530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 11764 bytes
SHA-256: d40031d43f7b3187e788a1b989d0211ecdb68143ddc8a117b7f98972dbcad764

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