Malicious PDF — malware analysis report

Static analysis result for SHA-256 d596851111f2ebe4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 16:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54e5381c67b7049ac7e7c988dfa23752 SHA-1: ef070003846d1ac336531981f29c358b5031e671 SHA-256: d596851111f2ebe499e8edb203430d74b113d439845a3c4ef8ae38faffd9b77e
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to lure users to malicious sites. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download. No scripts were extracted from this sample.

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=accidental+presidency+normal+font In PDF document text
    • http://fubixo.climatefx.org/uploads/1/3/1/8/131856907/kazomawukelem.pdfIn PDF document text
    • http://files.mushini.net/uploads/1/3/2/6/132681773/5277905.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/1/0434/4617/3852/files/ford_555_backhoe_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/72449086077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/biligifexikirazipiwiwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/kemulizowavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/tepanowatamupig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/dotelepezuguwise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/cogs_caravels_and_galleons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6281/1034/files/abordagens_psicolgicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/new_bollywood_sad_song_mr_jatt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/wesuwimoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/89407709539.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_off00004ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE4 5392 bytes
SHA-256: 87ab3379dd376b9726a2e670f8393d7cf2f126edfdfbe11d4506ff20fde876ab
font_01_sfnt_off00006122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 14480 bytes
SHA-256: 2d2be55fa15a8e4df4024bc942476c39838a396440de6cbc686ac0e5ce44a926

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