Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f87cb2ac20d7763…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 09:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac10cc9ef56a81e0fb6d3ba3b53a0509 SHA-1: 82bc4d770cfaf016b66375ce72465a8a09fab8fb SHA-256: 8f87cb2ac20d77637c0b6e6783c9a6e9a7fe6054ef19a6ff6411bd11e400d322
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting a lure to a malicious site.

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=how+to+make+a+paper+book+into+a+pdf In PDF document text
    • http://files.finblooming.com/uploads/1/3/1/4/131407263/2453151.pdfIn PDF document text
    • http://files.mpwsr.com/uploads/1/3/1/4/131438202/lukiwetezanixozelo.pdfIn PDF document text
    • http://files.rebeccajaynephotography.com/uploads/1/3/1/1/131164252/2805746.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/vulirinoxizadaranitaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/satisfao_no_ambiente_de_trabalho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/specific_carbohydrate_diet_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/tafovezemulive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/95073489983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/76001078180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/kimimonunilumeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/24939459125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/ropulebelusavazawanulasoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/ppct_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/xulugavuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/zegiti.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6749 5020 bytes
SHA-256: d0d68f2cc91278f4c6a0ba2c71e65c9149556d273707267f379b6ca94cd88bb9
font_01_sfnt_off00007844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 9916 bytes
SHA-256: 99e077c88b79eb801215e2430d2899bbbb087c548499f39af71badbbb078139b
font_02_sfnt_off00009a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A24 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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