Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d8574e9b6836db…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 02:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea6eff5578f51dde4d632aa94aeeca1b SHA-1: ac65f89fb11a64deac4f947a197acba98cecf5f7 SHA-256: c4d8574e9b6836db66edd70441344f991f92cf34138eda006099526331f92898
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'advertising graphic design pdf' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for 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=advertising+graphic+design+pdf In PDF document text
    • http://files.ferald.net/uploads/1/3/2/6/132682113/tuwabuped-barowagomupif.pdfIn PDF document text
    • http://febibe.casapalomabandb.com/uploads/1/3/1/4/131408849/zulumipojarete.pdfIn PDF document text
    • http://files.pdbravard.com/uploads/1/3/2/3/132302871/f96e0644.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/1/0433/6805/4949/files/man_tera_hero_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3267/2418/files/56201789138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1419/2284/files/logitech_keybaord_disable_tap_to_click.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/zotexole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/2020_ashrae_handbook_hvac_applications_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/vibuvenoluto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/949472411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/nanuwirilosakanizifenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/riwix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/diwejelumijofofexifafeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/situkopaxikel.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 3

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_off000063d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 5436 bytes
SHA-256: 1e07dbf84eb1bd0e960ac8884564d09a603e733beaa1c125f26496c0ac96ff6a
font_01_sfnt_off00007651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7651 10768 bytes
SHA-256: 9a0e72f6ab211987b5b64b556b14da6bb3658505738bfa9a0bc07fb8ce1ad5e6

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