Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd2d474d8d70b41…

MALICIOUS

PDF

74.5 KB Created: 2020-07-28 12:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa7e5ebb1bf379029ad40a78591fdde1 SHA-1: 18e0c68d7b828a30665d0e058175b389f817732e SHA-256: 2fd2d474d8d70b41b4696e68dca29368935caefd1c6118463233b8daaef58fc2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Bikroy.com java app'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to redirect users to potentially harmful content.

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.cc/pify?keyword=bikroy.+com+java+app In PDF document text
    • http://files.normannicholson.org/uploads/1/3/1/4/131452841/wusikumigo.pdfIn PDF document text
    • http://files.shandeezcollectiv.com/uploads/1/3/1/6/131606486/baxunu.pdfIn PDF document text
    • http://files.whatthesaintsknew.org/uploads/1/3/2/6/132682640/robij-dewopi-xuxas.pdfIn PDF document text
    • http://files.zndaughtersdance.com/uploads/1/3/1/8/131856409/1913828.pdfIn PDF document text
    • http://files.paulettesart.com/uploads/1/3/1/3/131398406/c5eae3.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/1/0429/2355/7030/files/jewutimamiwonasetesemom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/69407574963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/gukaxifevikotekesek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/6906361673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/xaxukuwenokufipap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/dedewagapewamijilefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/70353658479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/savokenufopur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/35255020194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/40647838607.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

Related samples 8

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_off0000b064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB064 4736 bytes
SHA-256: ad0383d9cb25fcf1932e5d09dddd42ae424231127fe7116934e32cc26b4ce852
font_01_sfnt_off0000c07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07C 18528 bytes
SHA-256: ef1f17cfac119c669d31f2689d7227f6e994407ba84a93267b1854f25eed2874
font_02_sfnt_off0000f754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 10976 bytes
SHA-256: 98aa08f847a897fea67ffbf2f3bd8b357bcbe5cb1aa86533476aeebf1da4bd10

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