Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbf2623be5c7039…

MALICIOUS

PDF

39.5 KB Created: 2020-08-17 12:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0923a1f15926dfc78fc5da53e938a649 SHA-1: 8eb173d17caf9fba7363d3ad8afd9d8f4a11dd40 SHA-256: acbf2623be5c7039656ba3688dbe537c6b37213c0b92b97c69addb98e65ffffe
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on ttraff.cc. This infrastructure is known for redirecting users to malicious sites. The document body, though heavily obfuscated, contains keywords related to software and potentially lures for users seeking free versions. The primary malicious IOC is the redirector URL, which is likely used to distribute further payloads or conduct phishing attacks.

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=abbyy+pdf+transformer+free++windows+7 In PDF document text
    • http://files.eudoniaacademy.org/uploads/1/3/1/8/131857421/zazuveke-palobajogaw.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/1/0437/3155/0362/files/annotate_onedrive_ipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8402/5751/files/boris_johnson_brexit_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/34317105066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/67815863472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5071/files/business_intelligence_and_data_analytics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/83918408745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/tower_defense_hacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/time_line_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2610/files/rebogegozazofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/cookie_clicker_editor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/12431794958.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 1

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_off00005bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF3 5556 bytes
SHA-256: bf0511689b34de9e11698afef8c94e8d742f0b37b02390bf05427ec064404e3d
font_01_sfnt_off00006ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED6 10216 bytes
SHA-256: 895dc991c2413de13a560f7569c75707b19f92361a5659e481ff79b866973bf1

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