Malicious PDF — malware analysis report

Static analysis result for SHA-256 528fc933af817e77…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 23:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5250cf9dfec6a1dc1010bd150b06983 SHA-1: 4987d297832d3b542f46bd8ca8ea1eedd4cd23f8 SHA-256: 528fc933af817e779161cda23d224b24f2d4c1c87327da9228f3c56e4da85655
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body itself is largely obfuscated but contains the same URL found in the heuristic. The presence of numerous links suggests a link farm or redirection strategy designed to lead users to malicious 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=class+diagram+for+railway+reservation+system+pdf In PDF document text
    • http://files.ganderinn.net/uploads/1/3/2/7/132710694/nezaxi-senema-sezatiwugebikux.pdfIn PDF document text
    • http://files.happysnapsstudio.com/uploads/1/3/0/8/130874526/lovufo-dafap.pdfIn PDF document text
    • http://vokox.billysbearfootcruises.com/uploads/1/3/1/3/131381428/fad5b8770df3129.pdfIn PDF document text
    • http://files.arizonastartales.com/uploads/1/3/2/6/132695244/soveduboluwu_fikonopel_zapogisa.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/1/0433/6504/0286/files/kuramujigijizuxevubikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/zijiwabemalufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/gumatezokitujovuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/58673921793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/lamaxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/search_git_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/34085702858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/37424162035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/dolunujovolug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6220/6357/files/84283929701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2256/4000/files/android_application_development_complete_tutorial.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 6

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_off00005f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 5520 bytes
SHA-256: 10bbac3c283522c8720c5c6eed74ca8417983b5253b2e52fd5b98a33c81eafbc
font_01_sfnt_off00007213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 13124 bytes
SHA-256: 5fb1b3a14d01c896ee9bd014672a36a1e1f791a6580a3234d91c69cd97f72747

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