Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a66b6160cb615bc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 09:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e2ae78da92e5b8dedc1efbe84b3dfdc SHA-1: 634450d02da72986b481ff14b85adaae971288a7 SHA-256: 2a66b6160cb615bc3afeb2aa5432924d9574761a9f0bb3d5f366c704892b6257
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 URL (https://ttraff.ru/pify?keyword=the+asch+effect+a+child+of+its+time+pdf). The heuristic firings indicate this is part of a link farm designed to lure users into downloading further malicious content. 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.ru/pify?keyword=the+asch+effect+a+child+of+its+time+pdf In PDF document text
    • http://files.1550art.com/uploads/1/3/2/7/132740214/mufudimokoxe_binosejiga_voxujajawubaj.pdfIn PDF document text
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdfIn PDF document text
    • http://files.krumbsnatcherenterprises.com/uploads/1/3/1/4/131483719/lerif.pdfIn PDF document text
    • http://files.uvcoolme.com/uploads/1/3/1/4/131407299/tujugireguroxa_nabiw_dejor_kobumavoko.pdfIn PDF document text
    • http://files.suzanneahmet.com/uploads/1/3/0/9/130969045/zubigavilanexejo.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/1/0433/9315/5230/files/32734842309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/tameporufasevibexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/71767596988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/81797568114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/letubefepetagumefije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4927/8875/files/physical_therapy_for_down_syndrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/postman_api_testing_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/lokivomoxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2652/files/70122986681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/jazz_piano_music_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8757/5705/files/53009569312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4051/7792/files/wotlk_prot_paladin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6987 5248 bytes
SHA-256: 1b1fdf89b44223a830dc9e5974addf69ff4c0aa66fa356ad02ae4aada8c6ab7b
font_01_sfnt_off00007b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3A 10400 bytes
SHA-256: d0aff235477560bea3e3746b67c81fd7da28312427de92c57c459771fb772a51

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