Malicious PDF — malware analysis report

Static analysis result for SHA-256 652b009c5b015fe4…

MALICIOUS

PDF

47.1 KB Created: 2020-08-15 02:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7429587ec1daf12043f2b8816616c57 SHA-1: cc134fe29e261141605167c2cf05a8e416d314d3 SHA-256: 652b009c5b015fe4a6b06307d2877cdee32c5ef12cc3414d3bd910c8ccd914f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Chicago bibliography citation guide'. The presence of embedded URLs and the heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to malicious sites.

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=chicago+bibliography+citation+guide In PDF document text
    • http://rezote.cswithwhitlock.com/uploads/1/3/1/4/131407005/divakepokelejeginofu.pdfIn PDF document text
    • http://files.maintenancemanusa.com/uploads/1/3/2/3/132303230/denelude.pdfIn PDF document text
    • http://files.bartek.systems/uploads/1/3/0/8/130813546/4418166.pdfIn PDF document text
    • http://files.bkskincare1.com/uploads/1/3/0/7/130775197/5462287.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/1/0439/1059/4728/files/dream_cheeky_usb_missile_launcher_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/tuwerudaromapug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/85044640251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/97885968661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/nigibajuxofewuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/statistical_treatment_of_experimental_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/57404992144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/pugavaworavupopupema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/zidekiwazijilikumob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/75814501486.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_off00007a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 5304 bytes
SHA-256: c21557895351d515e1bd823fd6a94b45eea729cc76fb3395975a7b10933f741b
font_01_sfnt_off00008c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7E 10272 bytes
SHA-256: c588b83491ebdee4915df7ad8f26230591d852ecbef5316319b58fc8e362b710

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