Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d9322368d58126…

MALICIOUS

PDF

37.8 KB Created: 2020-08-07 05:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a96255916c487f3733b9ddf00a5c6f11 SHA-1: 78907d80422201d9b42c565cdf07eba74e86a70d SHA-256: c9d9322368d58126ac5d5701f012d5926bb4c04f0428d6ca3b4d7eac325a8365
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.cc/pify?keyword=domestic+animals+colouring+pages+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=domestic+animals+colouring+pages+pdf In PDF document text
    • http://files.lizziedavey.com/uploads/1/3/2/7/132740700/zunoxitepu.pdfIn PDF document text
    • http://files.nadinebrockel.de/uploads/1/3/1/4/131408854/e61f58f650.pdfIn PDF document text
    • http://files.abeautifulmess.net/uploads/1/3/1/6/131606408/2714fb6e65.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/1/0429/9590/8761/files/42593591846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/41471542468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/drawing_tools_and_their_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/84930312629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/amoeba_sisters_dna_replication_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/vetaxebenuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/around_the_world_in_80_days_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/89244294456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/tank_warrior_bis_classic.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 4

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_off0000552b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x552B 5476 bytes
SHA-256: aa83792ebc0a51aa64106348c76f648322b954c7487a3a7fc2665a56e517a202
font_01_sfnt_off000067b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B7 10236 bytes
SHA-256: 8f5745ca7f5243ed922fc48e0c2a2301b1f801bf2bdec8a1f27201266568cf50

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