Malicious PDF — malware analysis report

Static analysis result for SHA-256 420aa1dbf9abca12…

MALICIOUS

PDF

46.4 KB Created: 2020-08-06 08:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b40455b44c73f955288e8d6bf26081b2 SHA-1: 623477491bb4f65f096402a3e803aff11787a95e SHA-256: 420aa1dbf9abca1220188c5bdb01868ee82f1bcfd88d137ecdd3ca47f18732f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier and contains numerous external links, a technique often used for SEO poisoning or to distribute malicious content. One critical heuristic identified links to a known malicious redirector service, 'ttraff.cc', which likely obscures the final destination of the attack. The document body contains garbled text but includes the redirector URL and several benign-looking Shopify URLs, suggesting a lure to download further content.

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.cc/pify?keyword=act+apostrophe+practice+pdf In PDF document text
    • http://files.teachallnations.org/uploads/1/3/2/3/132303269/gelazuwumovafuviz.pdfIn PDF document text
    • http://files.fearlesscounselingservices.com/uploads/1/3/1/4/131407511/rujaro-bubuziwujifopup.pdfIn PDF document text
    • http://files.thoughtfullyshelby.com/uploads/1/3/1/3/131398091/ruwuliteja-wezilutewan-nabawafamabiwu-jaxogaxo.pdfIn PDF document text
    • http://files.dig4con.com/uploads/1/3/2/8/132814073/bepajadowupo.pdfIn PDF document text
    • http://files.la-arts-district.com/uploads/1/3/0/9/130969471/936724.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/1/0431/3264/9636/files/calendario_365._es_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/23543585768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/dilifowaxevepupelesiluget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/biology_notes_igcse_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/39494763472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/einstein_summation_convention.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/fojesedaseme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/tusajaxezanep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/76150411887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/24731934719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/vokorumuxokuzir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/71627759096.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7878 5200 bytes
SHA-256: a03e9ed97b00f0c38991e6ea74d14137bda17335da65ed636e91afd7f044a48d
font_01_sfnt_off00008a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 10284 bytes
SHA-256: c7f55f52ab3d527f6bb3cc1f847cea2e2094f2efa0e2f41d104be40593b973ae

Open this report in the interactive analyzer, or submit your own file for analysis.