Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c51b35f125d9f3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-09 10:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8b645841cf2d08fb067e732a9a4195f SHA-1: 63390e5373d5d08b34012364b3f11ad66f29d8e4 SHA-256: c6c51b35f125d9f308a53ad44e22c7825153a39929d45a7a14ad318e3bc1dc41
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for downloading software, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=pdf+file+software+download+for+pc+windows+10 In PDF document text
    • http://files.studioofcreativity.com/uploads/1/3/0/7/130776111/gipuzomosin.pdfIn PDF document text
    • http://files.onlinefitnessunderground.com/uploads/1/3/2/8/132815123/pebepimin_zekuko_rabefesar_dobepo.pdfIn PDF document text
    • http://files.david-rickard.net/uploads/1/3/1/4/131453543/kexet-favisizigufu.pdfIn PDF document text
    • http://files.motherlodemontessori.org/uploads/1/3/0/7/130776413/2824956.pdfIn PDF document text
    • http://files.sidewisemusic.net/uploads/1/3/0/7/130775368/peketotojoxatedakode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/30721152378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/10576923599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/convert_to_rtf_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5275/9200/files/96017635652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/vaxezidusikudafilixem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/4851933169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/catalogo_vimar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/20390358003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/wituketabufibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/oscar_wilde_short_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/86427002662.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_off00006190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 5224 bytes
SHA-256: 5f3079069cc06a72b3b46f02a4f797b09ad031308978c32b4f51a504b507c9c2
font_01_sfnt_off0000736a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736A 9904 bytes
SHA-256: 6e9269a10701f47f1e76ba30b9596637120f0fa9395a96c0656b567d7a0a2526
font_02_sfnt_off0000954a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x954A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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