Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e82c3f1b7e761a2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 23:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05fa8b03c4ac0f10a98a7ec19cdb0328 SHA-1: 6a09f8e913c47717350b5cee50afd823833b2762 SHA-256: 4e82c3f1b7e761a27c8ee2a8e6e79cb94a79aef5f9ffa7a8f7c61c803caca6e8
194 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this document.

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=comment+assembler+des+documents+pdf+en+un+seul In PDF document text
    • http://files.abiwright.co.uk/uploads/1/3/0/7/130776037/nofovidowenuvuxaras.pdfIn PDF document text
    • http://jorufujoz.narakucostumes.com/uploads/1/3/1/4/131483281/9204606.pdfIn PDF document text
    • http://files.comeseescotland.com/uploads/1/3/1/8/131857213/kafamozovowe.pdfIn PDF document text
    • http://files.instriderunner.com/uploads/1/3/1/3/131380467/dd264c2.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/1/0433/9000/9502/files/95436207014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/zifabixexebeputapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/59968820953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4729/4875/files/werusosezimuteroxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/xotik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/vidirikuvejel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/equipment_of_arnis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/73269291661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/non_governmental_organisations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/fijixojisavesogasiguza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/77565491683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/learn_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/physics_books_for_neet.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 5

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_off00005c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C99 5300 bytes
SHA-256: c192285ba58ceb602265e211666429ec3f7a1a308955be1f08cdd7dfb63f82dc
font_01_sfnt_off00006e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7B 11232 bytes
SHA-256: 919ebdc3367666fa6328efb90deca10ae58fd9220155870097af52c60a5a67eb
font_02_sfnt_off000091e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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