Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f1e52a33d2bd67…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 06:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7823ddef6d35a62a569782ba8a5ab1d5 SHA-1: 0f517ac97fee44c87b4e5369cf393bf27ed98d97 SHA-256: c1f1e52a33d2bd673f29ce3813631560420a4f05d78cde6c829033ce85c3e9a6
274 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text suggesting it is a video compressor application. The presence of a visible LOLBin command execution instruction indicates potential for further malicious activity. The document body itself is heavily obfuscated but contains the malicious URL and references to the application lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=video+compressor+app++for+pc In PDF document text
    • http://tadoneru.whiteplainslodge.org/uploads/1/3/2/8/132816042/2363122.pdfIn PDF document text
    • http://files.artemisiaherbals.net/uploads/1/3/0/7/130740524/lepunuso.pdfIn PDF document text
    • http://files.volunteerfirefightersassociationoklahoma.org/uploads/1/3/1/4/131437685/talapepurunekap.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/1/0429/5226/1795/files/38721511795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/17195701630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3194/4602/files/negevojijebaduforewimivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/fimifobirikudigepibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/vojulerides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/catch_wrestling_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/52695910421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/battle_royale_manga_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/60873776104.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_off00006fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 5236 bytes
SHA-256: 1f3c6bb9d1602a8b9654590d76c42839063fa5bffa0f600802849cf59884b4aa
font_01_sfnt_off00008182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 10580 bytes
SHA-256: ae98d62bf755ee483d413215f062a83abd162fbeed9f08344b8226230e231213