Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be495b508a67a50…

MALICIOUS

PDF

45.5 KB Created: 2020-11-01 05:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e4d3cd96084201cc4cfc20f348ef1ded SHA-1: 5c792b4e483da8468182e1873db1431871cdaf6c SHA-256: 8be495b508a67a50e456adb784537083e5543ff58eb778780e5b8ed70e1c7423
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document also features a large number of external links, characteristic of a link farm, likely for SEO manipulation or to distribute malware. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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=plasma+balls+how+do+they+work In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f8a782e95990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f9b61ac4d787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f9a5398d2d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5f9917a0bb9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f88172addc97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fovezewi/32226939757.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/ziwenadazawetilulobozaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/nedifot.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/77070932174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3699/4467/files/poe_temple_of_atzoatl_guide_deutsch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9328/6808/files/48710345703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800cdc59-cccb-4c72-928c-11e3f89dbf1d/27813230080.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/star_spangled_banner_piano_sheet_music_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18fc5e53-1334-4689-8ce9-bad90eee723b/xatewixupitumopenurosiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6928/2725/files/watch_the_irishman_online_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6609 5096 bytes
SHA-256: b55f4e9aa977a8ee0b46cba313ed1d6de5999c12309cdf99099237afd34972db
font_01_sfnt_off00007768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7768 10312 bytes
SHA-256: ee662cfeab7dcb5a61a2c033088f324bddaafa86b98f040885f74f298ce96535
font_02_sfnt_off00009acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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