Malicious PDF — malware analysis report

Static analysis result for SHA-256 424ddcaec6ff7c10…

MALICIOUS

PDF

64.1 KB Created: 2020-08-25 23:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d862f767fe0c9abbfdaf6a3cc9de31b SHA-1: 4efabb5968ff67dd1ab53dfae73a284e2c23099e SHA-256: 424ddcaec6ff7c10083bb89ff0fb2e41075a45c1a9db185bf729c6a55e2900b4
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to obscure the final malicious destination, likely a phishing or malware distribution site.

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=watson+crick+wilkins+and+franklin+wo In PDF document text
    • http://ravifixi.bearsreg.com/uploads/1/3/0/7/130776167/nedotu_nutugimuzisav_tawefogadulotiv_zelobukas.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/1/0427/9736/7452/files/7597334387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/my_way_piano_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/dukukurowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/voluwimesekezisasafutodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/lokigevifav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/glencoe_algebra_2_textbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7784/5671/files/algebra_de_boole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/heaven_song_phil_wickam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/xomotirimukovavizesewesat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/54248026679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3830/0568/files/78371601410.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 1

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_off0000b2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B5 5184 bytes
SHA-256: 73bc8af6ee231923abfb4d2b71f81a46da4025716253c3bd03051c0ca1202c87
font_01_sfnt_off0000c478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC478 14912 bytes
SHA-256: 494b81782ed136857841dcc6d0b2e26a668586a0cb46a40cf4a28de66070f233

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