Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cad448e14859c83…

MALICIOUS

PDF

39.7 KB Created: 2020-08-07 03:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72bd2595b4877c527c3803ef06bfd623 SHA-1: 1e101855566f2c58e743ea74c158bc5fd502f6b4 SHA-256: 0cad448e14859c8336d5bb67b035b6603e2678a242dd58d4a92785673d5986c3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service at 'ttraff.ru'. The document body and heuristics indicate a lure for free downloadable content, likely to phish for user credentials or deliver further malware. The ML classifier strongly indicates 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.ru/pify?keyword=ielts+adjectives+and+adverbs+pdf In PDF document text
    • http://files.martinsvillesoapworks.com/uploads/1/3/2/6/132682076/5226262.pdfIn PDF document text
    • http://vipofi.ravensrelics.com/uploads/1/3/0/7/130776791/dogav.pdfIn PDF document text
    • http://files.rabbitcustom.com/uploads/1/3/1/1/131164112/lebonor.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/1/0440/7685/9557/files/business_plan_template_powerpoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9843/0876/files/airfield_ground_lighting_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/wifigaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/gifikitoxotubezikore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/kajisojedaparob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/zajasoratuxotojigudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/11073836611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/49164084917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/antilog_table_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/37456306123.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 7

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_off00005cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB7 5360 bytes
SHA-256: d3c59966fcac7c59965a314c62fe61ac21020756a94f4dc5a95dcd917134189b
font_01_sfnt_off00006f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 10336 bytes
SHA-256: 4f825fa58c7645c9144ca6e3943cdb3301d24a632043419b4269b8c11913d7a0

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