Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdef10554cd3f6c9…

MALICIOUS

PDF

57.2 KB Created: 2020-08-16 12:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da5f9cfef122c2abc4eb8a21f719545e SHA-1: 828bffacc5ef35223b392c7c7008ac580296c47a SHA-256: cdef10554cd3f6c9081ce97f40df79f7ed93dc8a03eb0b000e98c1024dfe0410
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to the presence of a link farm containing numerous external PDF links, with one specifically pointing to a known malicious redirector. The document body contains obfuscated text and a URL that appears to be part of this redirection scheme. This indicates a likely attempt to lure users to malicious sites, potentially for phishing or malware delivery.

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=bocio+coloide+nodular+pdf In PDF document text
    • http://duxenuter.deansvillehorseshoeclub.com/uploads/1/3/1/6/131607062/novutozeduxafufok.pdfIn PDF document text
    • http://files.keepsaladobeautiful.com/uploads/1/3/1/4/131437623/vazajajow.pdfIn PDF document text
    • http://files.woodmeremontgomery.com/uploads/1/3/2/6/132682701/mikomimenegut-xijenelele-dujezurupu.pdfIn PDF document text
    • http://tenuzi.wmaterials.net/uploads/1/3/1/3/131383042/zipilusurepu_xiwil.pdfIn PDF document text
    • http://zekizi.blueacesbakeshoppe.com/uploads/1/3/1/8/131857054/4345770.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/1/0428/9835/8432/files/32773531818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/adaylk_kaldrma_snav_kitab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/68986963636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/administrative_management_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/tegupaboxawasafiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/alan_walker_ignite_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/wufubepoxodivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/tesivasowofaxawagiromekoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/81801572498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/monazata.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_off000096bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BD 5020 bytes
SHA-256: 28718750d04f693808caf38cf3cc64d3a42c118b9667e8bb8a143a41b1865e6b
font_01_sfnt_off0000a7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D6 15536 bytes
SHA-256: 6448c77d0d7cee91376867b45b11f28e89fc04f35e3e25f43e970bfa86554812

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