Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8adba41122d875…

MALICIOUS

PDF

124.7 KB Created: 2020-11-17 04:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 188d9d805ac9bb37d9bb65657d3d4314 SHA-1: 936441fab170cc090e189753480e2eda2ef44ffb SHA-256: 3c8adba41122d87557b5f126a45b9c536564662fa27a023cdbb38ba61df8ddad
194 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it links to malicious redirector infrastructure, specifically identified as an SEO redirector for free downloads. The embedded URL, 'https://gettraff.ru/123?utm_term=pokemon+sun+moon+starter+fire', is flagged as malicious. While no scripts were explicitly extracted, the nature of the redirector and the ML classification strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=pokemon+sun+moon+starter+fire In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5f9b7f686b5cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c833f6-013f-4e4b-8ae4-79b15633c78d/tediwulitewaripax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cbb709-2238-4d07-98dc-43a0335059ca/buddy_holly_true_love_waits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241bdcf1-20e4-4a71-af28-e15b15eceb09/doxixigowadebaziwezov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4a2b89-92f2-4de3-a7a2-598abb8ae5cb/nejevepurizeweruva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe189519-52b1-4172-8038-e9a20c98c713/sinobaniwumurimenivinag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32f5853-5dff-4e73-935f-0cd21123493d/dojomomatemebo.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/spelling_bee_words_for_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e84431f-2df9-4c98-898a-e2f672ffa7de/mo__1_con_hn_hay_xui.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ganepezuvizaketa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3447739-ae9a-4cea-ad11-c7231cf6b79e/bojipugasezevib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b8f300-dcd5-42f2-b9cd-9fc11760d29f/iron_maiden_t_shirt_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10019d1-70b1-4803-8aeb-f41cf12b08f1/35559470318.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AA 12880 bytes
SHA-256: 346ecd16d5dc2dffb66a824d6cab80721499a6130bfda910404b30f036a935a2
font_01_sfnt_off000182ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182EE 4948 bytes
SHA-256: b46de73905583e87a5da5b7a5be3268fca072c8306528265fc973b4f659e32d5
font_02_sfnt_off000193a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A7 5904 bytes
SHA-256: cd56784b6460ea31576013d2b07c66c745a8f0d81db49986275078b17896491e
font_03_sfnt_off0001a2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2B3 13384 bytes
SHA-256: b0374555b8ff27ed11c8f3c1bda682a935cdba35526d32eb254cf1b3122980d1
font_04_sfnt_off0001cd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD7D 16204 bytes
SHA-256: b08ac2a2c1e9fb9ecedfbad54c43ddea84c46a0be0ff1fbe4acbbcfc8a395688