Malicious PDF — malware analysis report

Static analysis result for SHA-256 d527b8a3ef4b559c…

MALICIOUS

PDF

36.5 KB Created: 2020-08-18 20:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eefe07239763ff4fcf3a996b5efea035 SHA-1: e166534608ba003256d43ec60f37f7938230c7a3 SHA-256: d527b8a3ef4b559c6c504a504c34c8b0631682f0ef786ac95a7488ad816239ff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, creating a link farm. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=blokada+dns+apkpure', which is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the redirector URL, suggesting it's part of the lure.

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=blokada+dns+apkpure In PDF document text
    • http://files.swartzshowhorses.com/uploads/1/3/1/1/131163613/45de51953ca9.pdfIn PDF document text
    • http://files.jacksonanimal.com/uploads/1/3/1/3/131379894/bopuwil_wijiwomojajowid_gugom.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/1/0432/7089/7824/files/27016751428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/american_songbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/17906788543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/personal_finance_kapoor_11th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/45615242112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/concrete_slab_construction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/jevavatin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/baby_crying_ringtone_pagalworld.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 2

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_off00005249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5249 5064 bytes
SHA-256: c53134241fc426c67493efc588bb714358b9b0b7918d08509dd7e34fa8ac49b1
font_01_sfnt_off0000638d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638D 10000 bytes
SHA-256: 33ef9f81750fef0717522db6e1e2e0356c55718ad93430e5fcbc78ec83481964

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