Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a4022b8dd51a7d…

MALICIOUS

PDF

35.9 KB Created: 2020-08-01 14:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9798136eb0aa65d70dd6bc094afa2c3d SHA-1: 63828369362882e31ca36b7aecc55cffee7fadae SHA-256: b4a4022b8dd51a7d75c9a7f40d1cf3219d46d103834459bda2ff58df154f4f27
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=zzzz+the+cab'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure 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.ru/pify?keyword=zzzz+the+cab In PDF document text
    • http://files.gobo-projector.eu/uploads/1/3/1/3/131380467/bf12094b.pdfIn PDF document text
    • http://files.sritejareddy.com/uploads/1/3/0/7/130738956/5582605.pdfIn PDF document text
    • http://files.sports-supporter.com/uploads/1/3/1/4/131438510/470507d.pdfIn PDF document text
    • http://files.greatergoodconsultantsct.com/uploads/1/3/0/7/130775905/nuxenipirelonus_luzanefe.pdfIn PDF document text
    • http://files.playistheway.ca/uploads/1/3/1/3/131384777/b056c3b.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/1/0433/7877/0078/files/lubiferuvazup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/fozomixupilalutazor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5939/4213/files/76895464372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/30023545192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/fewamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/kononinuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/bopuwenafiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/51743986884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/61931953916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/70964097335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/78952056503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/94069581289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/bagobemunabeloniruranel.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 5

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_off00005123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5123 4728 bytes
SHA-256: c24f43c7ccfad94c398af677b861b09f29eb6c585c2028f6903e3f4c29b2aa0d
font_01_sfnt_off00006140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 9856 bytes
SHA-256: 4ab852b71cc055f5d9cdff8c2c43f6262b21b6dec41189180c2e0f8dbed2d460

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