Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a27de782eac0c8…

MALICIOUS

PDF

63.4 KB Created: 2020-11-03 05:34:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 679e3dfd8a26b4d02a7312dbf2094ebd SHA-1: 961c492e761f55ab8d61fc92d550487afeeaccf0 SHA-256: f0a27de782eac0c8afd1ad4d393c7b8bd345c883e38292ea3efb388533c1e9d0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/aws?keyword=orange+round+pill+7253+93` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to direct the user to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=orange+round+pill+7253+93 In 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/d930e172-77e4-4313-bc6c-6c2cb7c38601/outlook_com_sign_in_email.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9043/9069/files/race_games_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/finding_your_element_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3cfeddd-c637-4739-9494-17d432d82341/67510883677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c4dd4f-9665-4af5-bcae-cd00d6bc1ddf/vozixajumil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/according_to_the_exercise_principle_of_balance_a_workout_should_blank_quizlet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6133/5995/files/bolonuporodimiwodulewawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3fee26-af7f-47de-8e6d-1f5024c33ee0/sabororezubomepekew.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/25823704064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d903a8ac-7456-47ef-b1f0-8fccaa02ea66/18256461221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb70d845-dd56-4dd8-8f91-a153aeec7146/676686188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/advanced_engineering_mathematics_by_jain.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_off0000b50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50B 5632 bytes
SHA-256: e4f62aef783e1b5fa49e9e624f9a6b0eb63e2e2197d476c3e1bbf320524feacc
font_01_sfnt_off0000c83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83D 11948 bytes
SHA-256: d3e5bf737a2b55d7ce30601fe2f47366818f4d8ae1ade8f4dd1479c424a970bd

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