Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4b513055113beb…

MALICIOUS

PDF

44.6 KB Created: 2020-08-08 06:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fde0d77c50c577549de70f4216200885 SHA-1: 3657758f97fec503898c75a1025fdfb665493006 SHA-256: 9a4b513055113bebeedc3243b83dad9beb7fc7399971ef0e95c06202ea8fc8da
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Carcassonne board game rules pdf' and includes the malicious URL, suggesting a lure to trick users into clicking. The presence of a 'PDF_SEO_LINK_FARM' heuristic indicates a large number of outbound links, likely for SEO manipulation or to obscure malicious destinations. A 'SE_LOLBIN_RUN_COMMAND' heuristic suggests that the document may also contain instructions for executing commands, potentially via embedded scripts or by leveraging system utilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=carcassonne+board+game+rules+pdf In PDF document text
    • http://files.fincast.com.au/uploads/1/3/1/6/131607158/napiwewatidoren_lonotafegigev.pdfIn PDF document text
    • http://files.streetstampederally.com/uploads/1/3/1/4/131410370/6f13401db7b0e1c.pdfIn PDF document text
    • http://files.longsightnursery.co.uk/uploads/1/3/1/6/131606206/1600284.pdfIn PDF document text
    • http://files.acmdev.net/uploads/1/3/1/4/131438245/c930290ef648522.pdfIn PDF document text
    • http://files.sassysewingandembroidery.com/uploads/1/3/0/7/130776275/xugolexog.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/1/0435/1141/4943/files/dodajetoxapeteromebowem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/xideludaniranunezuvad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/balarama_digest_in_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/gumawenarig.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0449/9243/0248/files/nevetasesegadesezotikag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/artificial_neural_networks_and_their_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/numazageka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/astrology_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/68671711943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/60215913274.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 5520 bytes
SHA-256: ab6de6a079a566e35f90d6617ea42567d2bcaca603821bfaf8637d59d80cfea0
font_01_sfnt_off0000829f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829F 10240 bytes
SHA-256: 86dd210b548c55a7d255c9542c33fd0d0646e6d4eb192c90df4732bbf747d9c7