Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd2e774c5f7437f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-26 14:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e7058c930f400fc9fae105f28258cf7 SHA-1: a503970f93dc126a796bed191602b038d57d1e00 SHA-256: efd2e774c5f7437f02f8ee44bbc57de79379c8631bc2d4a72454a33fc67d170a
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links points to a known malicious redirector (ttraff.link), indicating a likely attempt to lure the user to a harmful site. The document body, though heavily obfuscated, also contains the malicious redirector URL. The presence of a large number of external links, including the malicious one, suggests a link farm or redirection strategy.

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.link/pify?keyword=tdbl1-+16.+00 In PDF document text
    • http://files.thebridesshoppe.com/uploads/1/3/2/6/132681985/9184649.pdfIn PDF document text
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/4/131455956/puziwoxem.pdfIn PDF document text
    • http://bukupaw.friendsofthecardiffrailtrail.com/uploads/1/3/0/7/130739573/fananulavexam.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/1/0435/2468/5976/files/nifozimafuromokelepekad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/morning_report_lion_king.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6737/5777/files/imam_bukhari_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/meretiraposirer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/arduino_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/felaxurizezaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1583/8628/files/weekly_calendar_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/wojoguna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/belovedozop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/dosarat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/flat_towing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/5381274101.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_off0000670b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 4836 bytes
SHA-256: a9884e558dc16bd6943964000c18234270b90d5594db81cc1dffd86695c79e14
font_01_sfnt_off000077a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 10084 bytes
SHA-256: d590b4c684e48741264004703c61301a461136a2a98ade9372598d120b535dae

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