Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b751e85dfd51175…

MALICIOUS

PDF

48.7 KB Created: 2020-08-11 09:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d97b6e5fea83ccbe129eb31aca44e66 SHA-1: 7ea1cb518078f2baca97768f749284c58f711f32 SHA-256: 8b751e85dfd511758fc587f745f2e6822d3c695b6601571df4b3501d544ea02f
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector link pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to 'building operation and maintenance manual pdf' and the malicious URL. This suggests a phishing or redirection attack aiming to lead the user to malicious content.

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.ru/pify?keyword=building+operation+and+maintenance+manual+pdf In PDF document text
    • http://wusuzase.magentadreams.site/uploads/1/3/1/6/131606490/fanojusikosodezof.pdfIn PDF document text
    • http://files.teacakeandgaming.com/uploads/1/3/0/9/130969887/lovuvokubeke.pdfIn PDF document text
    • http://files.pearsonmemorialumc.com/uploads/1/3/1/4/131437733/mulukuvuja_sozikafamitar_gotavus.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/92161478626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/49866709229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/rotetaxinitazagelibese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/vojibasodiregiwufizoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/13517189777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2241/7047/files/chase_mortgage_assistance_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/nesexugavudovojilarajuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/51173059162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/61059766912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/55930939509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/estrada_doctrine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/zoruliguxufaruzunubata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/36676118324.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_off00008120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 5344 bytes
SHA-256: 32ebae0b5158bfc3d9c655e30b1799959ba3a5e19cd64d5c99d56558817a119a
font_01_sfnt_off00009332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9332 10096 bytes
SHA-256: a6073d97b4f2688427b8c10eb4bfd1baff2f03e0df2b46dd59db4db2aec1c40b

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