Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be5d83a3f5cebb7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 12:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c23821a1540e21ff3a5b49b7f550d8a7 SHA-1: 7adb05419e5c3195edb30be378f56e59bc999ade SHA-256: 8be5d83a3f5cebb7c9e325566facfacca0f8227256941cd38f3bbe6ce8e1b4dd
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Ending sounds worksheets pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious sites, likely for further exploitation or phishing.

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=ending+sounds+worksheets+pdf In PDF document text
    • http://files.terrellga.com/uploads/1/3/0/8/130874031/vusivamew-wufapobiwuk.pdfIn PDF document text
    • http://files.umndisabilitybenefits.com/uploads/1/3/1/6/131636954/3b7f02875dc.pdfIn PDF document text
    • http://files.skyshedpodpa.com/uploads/1/3/0/8/130814774/wudege.pdfIn PDF document text
    • http://files.netherlandsandcoloniesrevenues.com/uploads/1/3/0/8/130874620/sunofunonowisi-vipakisizup-tovokonirak.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/1/0435/2134/3647/files/28590016900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/83383280687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/20002588022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/75510793225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/94955615311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/dufuzaxonedirololirika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/star_trek_legacy_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/30211493082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/zaxoloru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/takeuchi_tb240_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4609/9349/files/84386921503.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_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 5172 bytes
SHA-256: 5900b61e4bef115c76ee1d38d4e409928ca7e2f03b7609a2a1f766b8216acb54
font_01_sfnt_off000075b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B8 10136 bytes
SHA-256: dbd9c41725a6dede40a1019f5f0accd2bb0b7f739cdad5cb2b09d745d7f7db2a

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