Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0f89a87c5147bd…

MALICIOUS

PDF

36.0 KB Created: 2020-08-04 21:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b64adb09dc7b8dd1c1dc27a22bbde0a5 SHA-1: e23965148867c7c069d5ced7d6be312922a32cd5 SHA-256: ec0f89a87c5147bd52924861bd4258b19ad0ebc1521bffe227407751914b9ba0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.com/pify?keyword=ielts+writing+answer+sheet+sample+pdf', is designed to lure users into clicking it by appearing to offer academic material. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of numerous links indicates a social engineering attempt to redirect users to malicious infrastructure.

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=ielts+writing+answer+sheet+sample+pdf In PDF document text
    • http://files.shammaslab.com/uploads/1/3/1/3/131380279/mosiragikofudikuge.pdfIn PDF document text
    • http://files.eastbayspacover.com/uploads/1/3/0/9/130968937/mulovokakem-janoworafex-giles.pdfIn PDF document text
    • http://ralon.parentalparolees.com/uploads/1/3/2/6/132695492/970040.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/1/0432/3550/8392/files/hunger_games_pdf_book_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/korg_kronos_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/void_check_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/26116907587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1163/7401/files/venolawimula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/tinofufuluwawalopegiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/35014667457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/black_jesus_ep_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/zebunevogopiraxatuvep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/sesozonaxaxegopoboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/vaver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/nepomikeloledugujepotewo.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 2

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_off000043f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43F5 5164 bytes
SHA-256: 56cff27aa3c17a509b8e1981e6677c7cfb70e6ce00a7d3b3ceef398c074ac6f1
font_01_sfnt_off0000555a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555A 9188 bytes
SHA-256: d8b70ed54be33457317448e32f79be49cce2ff0be9503b7e6d8014e9d471c063
font_02_sfnt_off000074da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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