Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dab4b5299e52c68…

MALICIOUS

PDF

44.6 KB Created: 2020-08-04 05:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a81640b95f32e0ccba549f1813aa10fa SHA-1: cc5dbb184fc91f79a320398c1aea004f3a66e419 SHA-256: 4dab4b5299e52c689efeb4b74a7689f7c0496be1999d80b612c0355d0580ea1e
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure for downloading a PDF related to composite materials. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt. 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=composite+material+book+pdf+download In PDF document text
    • http://files.ibmypphe.com/uploads/1/3/0/8/130873908/bee5821c04dddf.pdfIn PDF document text
    • http://files.laurelmburas.com/uploads/1/3/1/4/131405977/821ed3f.pdfIn PDF document text
    • http://files.jeremy-dodson.com/uploads/1/3/1/8/131872178/765959.pdfIn PDF document text
    • http://files.craighouk.com/uploads/1/3/1/3/131398236/6131216.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/1/0436/4759/8742/files/89888937393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/kexebojixuxopigepapekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/ascii_middle_finger_one_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/bamejolanikurupafubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/bepagojubilebapepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/gemiraduputon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/green_smoothies_recipes_for_weight_loss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/35983848022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/beforejijipudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/micah_stampley_our_god.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/51401308167.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59DF 5388 bytes
SHA-256: 08c371d83d33aed8cccea9b8e8169c7ce32322d47c03712f23c720d125b0506e
font_01_sfnt_off00006c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C19 2116 bytes
SHA-256: 33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
font_02_sfnt_off000075e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 15216 bytes
SHA-256: a68e53a4055f6108f2417682a1243ec3e040dca3c177dd73d3935f38a1a8d566

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