Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed9421f7b526f8b…

MALICIOUS

PDF

46.0 KB Created: 2020-11-05 10:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 74323bd07e636fb1bb9f3ac266ab558a SHA-1: 1aa4cbe85ddcfbd391553d19681d974ef00db669 SHA-256: 6ed9421f7b526f8bc650265a9d2cde9732ca9a7e4440831d4adbafbe94ed20ab
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to `https://ttraff.com/123?keyword=minecraft+tutorial+world+map+download`. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link-farming or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the lure.

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://ttraff.com/123?keyword=minecraft+tutorial+world+map+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f88ed8fdf9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5fa302431c8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f8e4e5f65e6e.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/c9cd60f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5f8ddaac8efdc.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/wegugus/roland_sands_jacket_ronin.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/wupap.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/jomajepiwabakunuvetapovuw.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/basusoxetenuko.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/86410525531.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_off0000669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 5104 bytes
SHA-256: 4d87ef979407108899c332d6a1c67b7d5534be70d6538ad3f9b175f4f359ea33
font_01_sfnt_off000077e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E9 11008 bytes
SHA-256: 45812959295d5b3875e07e2a679419653256c98eaeebbedcab3badd8899f0cef
font_02_sfnt_off00009d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D03 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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