Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bcfff44c9638cc…

MALICIOUS

PDF

47.3 KB Created: 2020-07-30 15:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b51180ba533bc163e07a70ded32c0500 SHA-1: a130148d994fa245b52ac1dece3bd1984d37e2fb SHA-256: 88bcfff44c9638cc67e602c32dc0138bab6b8def6090b8b60f23943cf06e1994
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirector domains, including 'ttraff.cc', which is flagged as a malicious redirector. These links are presented in a way that mimics search results for a popular book, suggesting a phishing or scam attempt to trick users into downloading further malicious content. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links points to a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=roald+dahl+enormous+crocodile+pdf In PDF document text
    • http://files.threeoakwinery.com/uploads/1/3/0/7/130776037/lekopu.pdfIn PDF document text
    • http://files.wilmaderksen.com/uploads/1/3/1/4/131453818/mefiwu.pdfIn PDF document text
    • http://files.communicartspeechpathology.com/uploads/1/3/1/4/131437702/rirexamovikumus.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/1/0435/7272/3875/files/gosepox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/wilamavobevuzib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/viborojovexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/soxewovima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9065/6936/files/22313320103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/74051669182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/vifanaxesebivutolavala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/66923055322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/68790158722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5948/6626/files/damareju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/kugez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/43439989907.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6C 5204 bytes
SHA-256: 82f99ed6af4eaba12a3a147364205655d6db82e788d59532e71eebae9ccee1d9
font_01_sfnt_off00008de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 9996 bytes
SHA-256: d112a3e170a9ad5cbbd94b0b5881f289948972b9bc2bac206ecfa7a29853a78a