Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a81b35bf86c96f3…

MALICIOUS

PDF

61.2 KB Created: 2020-08-19 23:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb7492b72616b9e8af71270d4581b342 SHA-1: ece1669caa884878a0acdad532209c7666c9fa63 SHA-256: 4a81b35bf86c96f374dd19e9a5db6acde8a598e6a631fc3569743389d7693a4a
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for 'new assamese video', and the embedded URL `https://ttraff.com/pify?keyword=new+assamese+video++asomi.+in+2019` reinforces this. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic. No scripts were extracted from this sample.

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=new+assamese+video++asomi.+in+2019 In PDF document text
    • http://files.martagonzalezaregall.com/uploads/1/3/1/3/131378899/vitofuxe.pdfIn PDF document text
    • http://files.georgetimmermans.com/uploads/1/3/1/3/131397946/7701400.pdfIn PDF document text
    • http://files.hole-group.com/uploads/1/3/1/1/131163752/7d8550cc88.pdfIn PDF document text
    • http://buxago.bodymoksha.com/uploads/1/3/1/6/131606457/buzuluxikomemid.pdfIn PDF document text
    • http://vegavat.companionsnotlivestock.org/uploads/1/3/1/8/131856023/88e371839630.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/1/0431/6125/6096/files/28245873175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/kewagalekoroxusoratuniti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/fusoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/45561569764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/69278496508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/order_of_adjectives_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/lagovojakoramexudaribowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/55871767057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/bukuvawazujolub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/cracker_barrel_menu_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2388/2645/files/davesabepuxezagewewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/feduto.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC6 5476 bytes
SHA-256: d7e13b19eeb2bf64cbc4c03681e68bc0c545647d364376bcbe5bdd036083a1e1
font_01_sfnt_off00008178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8178 5344 bytes
SHA-256: 1d1b47621eb6f31e71dd6693f2302fdb82fc888d5af9312e1218a1409b44640f
font_02_sfnt_off000092f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F7 8276 bytes
SHA-256: e2e6dae3d0fead58e79b290b818da1656cbc97c7e4c6662bcb3b73e747107d7f
font_03_sfnt_off0000a94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA94D 10976 bytes
SHA-256: 89cc54bf347163a7a1c79b6f17998cdab7699b1231688ed1ed9e646472b67e87
font_04_sfnt_off0000cee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE4 16216 bytes
SHA-256: aaf572d00a855f20815910e8c1d6548a5f51f75b4536b7d0b60e8fd90f939201

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