Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c18409969954935…

MALICIOUS

PDF

39.1 KB Created: 2020-08-01 12:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e84e6d893618f3a4d85c1abb5862bfc2 SHA-1: ce23e8b83bce2aa6cdae54a53690c110e56bf72f SHA-256: 4c18409969954935ba210c04e9b86e6183cf2653f48be5eb09c53c55e9dc921f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector to traff.com, suggesting a link farm or phishing lure. The document body, though partially garbled, contains the text 'Convert. flv to wmv' and the malicious URL, indicating a social engineering attempt to trick the user into clicking the link. The ML classifier strongly supports the malicious verdict.

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=convert.+flv+to+wmv In PDF document text
    • http://files.quesnelarts.com/uploads/1/3/1/8/131856365/zafojorokisumub-gekunan.pdfIn PDF document text
    • http://files.undergroundscoffeebuffalo.com/uploads/1/3/0/8/130813514/2505348.pdfIn PDF document text
    • http://files.vivatanbeautyboutique.ca/uploads/1/3/1/4/131437246/junilumofaxume_xikitukaxi.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/1/0430/6580/2905/files/zuduzuzopanuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/bexamupopuzufekavemixara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/55553779602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81599599528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0336/2975/files/6908891391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/63063547000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/begozowavapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/43267066248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/lenev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/69923816037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/78380670376.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_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 4616 bytes
SHA-256: 8bead1d1a76c7a025a6dc3975972c73f90d76526882d680997322e7bfdc245b8
font_01_sfnt_off00006cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFA 10156 bytes
SHA-256: 72157bed0c6d322c5d1fb72fa550b4c480e50c91274795ca725dc6320acc20a9

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