Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f79f7c32b64639d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-05 15:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b55fe4c14fd341af866f92456ec8d5d SHA-1: 24eaba25faef6d05381d9a7ab426f92099f98454 SHA-256: 4f79f7c32b64639d2c57db143458b5a3a77489932253469139024ab7cdbe7d16
202 Risk Score

Malware Insights

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

The PDF contains a call-to-action button and embedded links, including one pointing to a known malicious redirector. The document body text and heuristics indicate a lure for a 'VCE to PDF converter app download'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vce+to+pdf+converter+app+download In PDF document text
    • http://files.isis41don.com/uploads/1/3/0/9/130969059/fiwojevapedusazo.pdfIn PDF document text
    • http://files.11across.com/uploads/1/3/0/7/130738619/mopupolel.pdfIn PDF document text
    • http://files.vintagealleyverona.com/uploads/1/3/1/4/131438240/6837597.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/1/0433/0687/7080/files/bebupikisanomagidilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/sorikatidifav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5296/5789/files/67759936507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/ctet_2020_notification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/jogobuzopobizaranoganadil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6773/4171/files/64342092039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/59289612117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0200/2584/files/mivisesixoxajewowizuraro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/mega_man_street_fighter_x_tekken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/pisewolezimusewojunozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/gasekijafiwixedezo.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 6

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_off00005bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF0 5088 bytes
SHA-256: 308bb5fa444b26e6f9b985f3e0286cec387404c7fd31024b2fc327a843042291
font_01_sfnt_off00006d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 9964 bytes
SHA-256: b99deef778f2b71522347cba0bf6c7598d1baa512f308970ee64e8735b142e34

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