Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab96e8c92754324c…

MALICIOUS

PDF

40.8 KB Created: 2020-11-03 06:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 699146ba963e0db3445ee171ec828a36 SHA-1: ccb01b82c4c0720acafc2a5a4adfa202754fd495 SHA-256: ab96e8c92754324c5063218684c06479277186354ba9fdddbdda5d606a1ec900
194 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 lure users into downloading potentially malicious content. The document body and heuristics indicate a phishing attempt disguised as a game download. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users to harmful sites.

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://ttraff.link/123?keyword=drop+cool+math+games In PDF document text
    • https://pawikewam.weebly.com/uploads/1/3/4/4/134445239/jijotuvaradaf-jitow-mugeridixukep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/paradise_lost_summary_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/6226608439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8668/3800/files/hotspot_shield_apk_android_cracked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7409c7-7c2b-46ff-8da3-48c7f3ea208a/tikazubufulatotubaper.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/22473029865.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/dotixafesenutekov.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/mupizuzadamusubebewok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8176/3483/files/16804152525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7778/2690/files/loggerhead_sea_turtle_phylum_characteristics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0360/7705/files/7466981222.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_off00005f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 5344 bytes
SHA-256: 4be73fb34ac2951daefa31a9aa3483afd991334fef2706fb8023a50c3d1fc7bf
font_01_sfnt_off00007109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 11136 bytes
SHA-256: 46b19603b2d1552d7a59a7120e5b4bddb37cf9d2e59816c8091776a4591312e6