Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1249335567ee6f…

MALICIOUS

PDF

31.6 KB Created: 2020-10-31 01:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 26a94f8cae8392da43e9562cc04d45c1 SHA-1: d12025bda46001853cb1a17aada2e68cbefd35b8 SHA-256: be1249335567ee6f0069aff4f428787a75020ab1095be0bfbb4dfd06a3440bd0
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.link/pify?keyword=devil+may+cry+4+trophy+guide`. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to a trophy guide and the authoring application, but the primary malicious activity appears to be the redirection to external, potentially harmful, URLs.

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.link/pify?keyword=devil+may+cry+4+trophy+guide In PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/tozuladalekijuk_palixutagamojux_minud_biwavag.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/zoguma.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/1/0495/5091/7784/files/vezegibobafomujimabuteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1298/0390/files/rice_growing_guide_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/xabosasaja.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/nabibipoditolotog.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/65120373816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/mujexopamutaligigaraw.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/14583476743.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/tefekalemapesuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/48829902977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8642/8324/files/iptv_dvr_plex.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/gastroenteritis_bacteriana_aguda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5472/5802/files/buy_here_pay_here_cars_greensboro_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9365/4202/files/19439903804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2323/5735/files/wevaja.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_off000041f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F7 5560 bytes
SHA-256: cfefad3aa82852a1a78b43b00a65b15be14ac90880e3166c393df142945a3683
font_01_sfnt_off000054ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54CA 8428 bytes
SHA-256: b675cdfcd3e97e14e6f94a2aed10deaa21c25a5d8cc1beadfd59dd5b583889e7

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