Malicious PDF — malware analysis report

Static analysis result for SHA-256 15235dae20b50550…

MALICIOUS

PDF

57.9 KB Created: 2020-10-07 03:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2266a0b7033d67d651e3fb5a7fc9bf79 SHA-1: 78ce763ef986600d3b6b04c9e88217d34c139829 SHA-256: 15235dae20b5055056878b6f9b11222cb58354bac96402f9d17a8e7d601bc872
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.club, which is likely the primary malicious objective. The document body contains obfuscated text and URLs, including the malicious redirector URL, indicating an attempt to disguise malicious activity.

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.club/pify?keyword=justin+bieber+games+unblocked In PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/93370168456.pdfIn PDF document text
    • http://files.skippysfrenchtoast.com/uploads/1/3/0/7/130775734/rijepidokasewama.pdfIn PDF document text
    • http://temipa.modtone.net/uploads/1/3/0/7/130738848/xiwikunizape-japase-lonoxus.pdfIn PDF document text
    • http://files.ladyofthewoods.net/uploads/1/3/1/8/131871825/nolujomogesulimipo.pdfIn PDF document text
    • http://piravut.pieroth-winetastings.com/uploads/1/3/1/4/131438397/7412397.pdfIn PDF document text
    • http://ropag.kerkterrein-driebergen.nl/uploads/1/3/0/9/130969060/32d005.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/1/0482/9963/8945/files/desoto_county_jail_inmate_search.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/persona_3_ken_social_link.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9103/6833/files/lejufanova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4545/6542/files/spider_web_graphic_organizer_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3585/5518/files/30642744701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4558/0700/files/51559448150.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
stream_003_off00006bcb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6BCB 17016 bytes
SHA-256: 85aa068ddf0d762e671124e6036b25e44b8e0d4674c678c889026acf6230bd23
font_01_sfnt_off0000a172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA172 5452 bytes
SHA-256: 221dfc17fb762c414433ece675c9540ef826c4c58ff260279d71e093ab7b087c
font_02_sfnt_off0000b3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DF 11588 bytes
SHA-256: a30032cc931f133c33fa48b3d61032aaad59ac35ae0331daf3bf5f33f746290d

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