Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed909bb4c427d78…

MALICIOUS

PDF

73.7 KB Created: 2020-10-27 23:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 757e2a5b54263a3fdb8fde4e9faeb7de SHA-1: d7f82d725f921a9a85536ab71e72610a447f10e5 SHA-256: eed909bb4c427d783ba43fc880845ca678023c46844db8dadc1cc00fb16232b4
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.com/123?keyword=hyper+tough+gas+trimmer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f90b2fa3f753.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/budavumogebafu_zubewu.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/853877.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/dozumozavo-berikeduvas-tabegofam-pikevafabe.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/09be98978.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/8a9a0ea0fbc82.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/1/0500/2133/5189/files/resistance_board_game_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7867/3094/files/allocation_unit_size_usb_exfat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4857/8471/files/scaphoid_fracture_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/1776/1702/files/lofutokukuriva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2302/2752/files/fudovasifuvetiregi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7616/9109/files/whirlpool_dishwasher_manual_wdt730pahz0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0041/3346/files/9172376401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4012/9202/files/amharic_film_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0888/5414/files/pidopugon.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/16897179625.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/5th_symphony_beethoven.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/canon_lide_300_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1795/2189/files/xutikatituperifefeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7808/3255/files/gidget_goes_hawaiian_netflix.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_off0000d616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 5296 bytes
SHA-256: 0ef9faaabc2e42054900443ec857957a56ade5d005883c17dd68ffbfff105947
font_01_sfnt_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 14776 bytes
SHA-256: 69de28db1ee637aa0e8eed3bcf3eb4512bd2ae783ac930e1bb21cb2d4df734be

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