Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebff04ad0755fec…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 15:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27c8863897fe1b728c82abb0c7d0fc69 SHA-1: cb1b129cfd4ae3184418e74b4d7b90bf3e2373fc SHA-256: cebff04ad0755fecefd575c8ed4e78d0cb5d9fe143c1717fb7a5f265de259ef1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, references 'Hadoop beginner's guide' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic points to a large number of outbound links, typical of SEO poisoning or link farm abuse.

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.com/wix?keyword=hadoop+beginner%2527s+guide+by+garry+turkington In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b207ad7ef46945b7889860c5efc70661.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b88e3d_f8edc61e1d98436386329e0071eb0e49.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_31ae5b9fda44486e9c06b3ae4c9525ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0bcf16_7847def550f34cee93dcfaede764eb54.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1721/3864/files/federal_circuit_docketing_statement_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/abhay_film_video_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/50954730907.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3d4187b9a0dc4ddfaf08550547ff3873.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b11f6d_c5f4359b83ff49179ea7a54b8c5052b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cc5c1ca9c9a94096a5d4d6580337202a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aca14_6eeeb72611a64507aad339a710b9778d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_89cef761142c4c779db0111a0104eadd.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DC 3080 bytes
SHA-256: 8574919c7c8a9f024103958ce015253c5a24b8e646cdb5f787658918713f2b2b
font_01_sfnt_off00006fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE4 5396 bytes
SHA-256: 971bf1261e0d49c1348c86151644937b3b665e36f11766112acab1bdf0bec3b1
font_02_sfnt_off00008255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 10032 bytes
SHA-256: 6b17f40032ed54802e0079e68f00a3df7eb99aef801ba8b9a2821336821e8596

Open this report in the interactive analyzer, or submit your own file for analysis.