Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b4ff4f22bfa3f6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 20:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2edb74e0df68a61bdd9a7a6286ffd1af SHA-1: fd14969fc8c3412da8ca4884fc9175f37a24e3db SHA-256: a6b4ff4f22bfa3f6721352b8eb374867be7538441171bad4aeb4b624fe5f6770
194 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and embeds multiple links, one of which is a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a seemingly benign document that redirects to a malicious site.

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=hand+exercises+for+carpal+tunnel+pdf In PDF document text
    • http://files.lhaconsult.com/uploads/1/3/2/7/132740584/6117257.pdfIn PDF document text
    • http://files.msmvpa.com/uploads/1/3/1/8/131857465/nerokijud-pukuxoxamokoxo-gejadinisuzo-wabot.pdfIn PDF document text
    • http://files.misscheviouscrystals.com.au/uploads/1/3/1/4/131438840/fugesiro.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/1/0433/9515/4070/files/pevaxepiturikobawev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/adeept_smart_car_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/vunosobibomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/donunivikulosokamogiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/22032124613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3398/4161/files/malayala_manorama_calendar_2020_september.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/fivubebaxuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/brave_new_world_chapter_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/xopiwotakudetofenazor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7320/7446/files/rizuwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/5168579273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/fomabadokofobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/rafutafosapuwubiri.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5060 bytes
SHA-256: dc9d8324a1c2ee43b1076f5175378909ab167684f9286dfde4dd31a469a9b65f
font_01_sfnt_off0000750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 10060 bytes
SHA-256: 63578210697b2458b4190dffb688813af8dba814b4e4ffb460cb1ab942369663
font_02_sfnt_off00009786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9786 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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