Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac81544f41a6854…

MALICIOUS

PDF

45.4 KB Created: 2020-08-20 14:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eae849e20946f0ad35fc7b84d35d115d SHA-1: c67ccbb06c05791716e3f0fc40378d29eddfb236 SHA-256: 6ac81544f41a6854ea38823278afd5a0bca5582bce1b00785d30236bc46928b7
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The presence of an 'enable lure' heuristic indicates the document likely prompts the user to enable content to access these links. The ML classifier strongly flags this PDF as malicious, and the embedded URLs are consistent with SEO-based phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=2+inch+binder+spine+template+microsoft+word In PDF document text
    • http://files.everbrookefarms.com/uploads/1/3/2/8/132815968/rozuva-refagomudi-webiligijifijej-lotilawalobu.pdfIn PDF document text
    • http://newapig.syntheticephemera.com/uploads/1/3/0/8/130814017/2947833.pdfIn PDF document text
    • http://bokifema.caribbeanshadeproducts.com/uploads/1/3/1/4/131453177/gadetubirafevofejowe.pdfIn PDF document text
    • http://files.balmdotcalm.net/uploads/1/3/1/0/131069968/5683247.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/1/0451/4267/1513/files/11294769638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/sky_f1_calendar_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/agile_software_development_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/lusunuderatunidixat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6400/8605/files/bajaj_ceiling_fans_catalogue_with_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8612/2901/files/makalah_bilangan_kuantum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/83971830720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/subway_franchise_operations_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7397/files/42533795177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/34079228770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/14766637453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/68070280406.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 7

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_off00007330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 5664 bytes
SHA-256: b24d161c6b2cf6b48fd54fda12aac5fa37580b99e7ded1e529946641fccb64a5
font_01_sfnt_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 10060 bytes
SHA-256: 66c7255e2dbb20aef31c654ad39f20d0a51091e9fc4537e7bf2f4cbd31c0939f

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