Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac86cffa1f1fb3a…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 10:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c0828118d84d677b6c1e863e5d0c5efc SHA-1: 7148cd2c19dda1557447419a5778c00b8873f640 SHA-256: 1ac86cffa1f1fb3af710e6da6287dc237f53eaf7c00f9b839e9b3e2a242d3f84
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to potentially harmful sites. The document body also contains numerous embedded URLs, many of which are part of a link farm, further supporting a malicious redirection scheme. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify this as a malicious PDF.

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.com/pify?keyword=integral+calculus+by+das+and+mukherjee+pdf+book+free+download In PDF document text
    • http://purudu.reading-works.org/uploads/1/3/1/1/131164250/lunijeba.pdfIn PDF document text
    • http://files.williamkdeugenio.com/uploads/1/3/0/7/130775768/c98184f28de902.pdfIn PDF document text
    • http://xuxarujux.langfordlab.com/uploads/1/3/2/6/132682646/1000745.pdfIn PDF document text
    • http://files.abphotography.org/uploads/1/3/0/7/130776493/dotasiribejev.pdfIn PDF document text
    • http://files.hisinscriptions.com/uploads/1/3/1/3/131383973/154091.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/1/0429/2175/4787/files/fresher_party_anchoring_script_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/kosibegifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/nadenogazusixejefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/93423674959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/timewivibomib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/writing_better_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/17752372308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/23126263504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/kindle_book_to_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/programming_in_java_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/deisenroth_mathematics_for_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/metonadejuwofufedilijamet.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_off000047ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47ED 5980 bytes
SHA-256: 875ef85da3e8b9abaf78bcb796f1c609e9f0f2fb74e93e97fdcd175295f1f40e
font_01_sfnt_off00005c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C27 9852 bytes
SHA-256: 2bc5947aeb33215234820a5f52bbdadfe9b068bc5370ddde8361d0046aee671e

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