Malicious PDF — malware analysis report

Static analysis result for SHA-256 65708421ec02accd…

MALICIOUS

PDF

44.3 KB Created: 2020-10-27 07:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dccda7ee6932e8b75f9a9775e9eded14 SHA-1: 6e6102e5d0f51da27837f3655f244066c131aa7a SHA-256: 65708421ec02accdf86c093a399f2dc2184e3391be85b97d9d0590a142792667
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to a redirector URL (https://cctraff.ru/strik?keyword=pentagon+spiritual+meaning). This redirector is flagged as malicious and is likely used to lead users to a phishing or malware distribution site. The document's content, while appearing innocuous, serves as a lure to encourage clicks on these malicious links.

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/strik?keyword=pentagon+spiritual+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f8964c42fd14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f90779a3e332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f8b348596885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f90bc73a8383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8825/8219/files/ben_hogan_grip_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8353/9628/files/the_road_ahead_bill_gates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5466/4342/files/pidabijitaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2415/3248/files/kenmore_washing_machine_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253f6aa5-4eeb-4f3b-a09f-bfa7315e1aef/rubakifumopunot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6acbb8fb-ca49-4c7c-bdf2-fb105de141a8/elite_dangerous_interstellar_factors.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/important_english_grammar_rules_for_competitive_exams.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/95152730500.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/neluv.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/assoreamento_de_rios.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/lapifopesinetitozefajipi.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/vevibudirev.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/balanced_scorecard_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/42372134304.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/gobejumukasiwaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14addb1c-75c9-42a2-aa88-02d532ebe59b/94144537976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db292b9-b657-4cd1-ac63-df44e925a8ac/97235509607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ae95df-88f4-4b34-bfc5-66a936bf1de9/sprinter_hacked_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dae3c84-4ef0-4b05-be47-252daf17ea62/nachange_saari_raat_soniyo_ve_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb85a52-77ef-40c6-86f7-7fc0048026b0/14444682134.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_off00006e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 5140 bytes
SHA-256: f36c1abc7de083ed634e4b6ae93e55316b6f7e61b8b00465ec6ece9d5c78baf5
font_01_sfnt_off00007f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 10524 bytes
SHA-256: ca22d05150db332dee17b14c31870e89b017a0cd9e9233628a34d5b3aa551328