Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b154f31c7cb822…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 16:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f077294afa47216c873d872691d19d4 SHA-1: 01c2cb2dc07e8c43915935965d74643037dea30f SHA-256: 82b154f31c7cb822af582065877e07c361c22e41b31c4dda53e59cdfffbb55f9
202 Risk Score

Malware Insights

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

The PDF document contains embedded links that point to a redirector service, which in turn leads to other PDF files hosted on various platforms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the primary purpose is to direct users to potentially malicious content, likely for phishing or malware delivery. The presence of the 'SE_INVOICE_LURE' heuristic suggests a pretext for the user to click the link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=carers+allowance+forms+pdf In PDF document text
    • http://files.billelenbark.net/uploads/1/3/1/3/131384429/tatizewadub.pdfIn PDF document text
    • http://files.estebanmontesinos.com/uploads/1/3/2/8/132816042/fc85849bf8.pdfIn PDF document text
    • http://files.bluestarrichmond.org/uploads/1/3/2/6/132695517/9471766.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/1/0431/2917/6232/files/36721192500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/daworufuluxeper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/tadukefovaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/zalefafiragenaber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/schneider_switchgear_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/jaxilegegadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/47198029422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3003/4085/files/46194117016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/bajuzomibepiwaribozajikem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/19078218921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/nomemijugedowukegal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/sim_code_for_shift_register.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3884/9694/files/69819854439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/vatimoregipijegukutoduvem.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 3

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_off0000628f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 5296 bytes
SHA-256: 453fa60f1e4b7af9b9d32eed39bfa79ec16f8ef732c22a673dd46a5803273de1
font_01_sfnt_off0000748e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 9944 bytes
SHA-256: 00bfda8e70d5d6faa5145e19267df21afaef71a3d079dfc936a43679afa2e328

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