Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00ef9b7b553045c…

MALICIOUS

PDF

53.2 KB Created: 2020-08-12 13:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9df2c4a607bb62668fd5f6ed212001d SHA-1: b4f3090ac0b7d5db16cc310f5687dd9b9c6fb693 SHA-256: a00ef9b7b553045ce9f1b376cae1c00709d3a86a8fad4cf616af3deb5e01ed65
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to academic performance questionnaires and includes the malicious URL. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=factors+affecting+students+academic+performance+questionnaire+pdf In PDF document text
    • http://files.light-sup.com/uploads/1/3/2/6/132681002/lolonegesositub.pdfIn PDF document text
    • http://files.trebor-ts.com/uploads/1/3/1/8/131871690/4fa93.pdfIn PDF document text
    • http://files.sfhenson.com/uploads/1/3/1/4/131437885/danijosisaz_tewowefaj_sefuv_nurarijopurig.pdfIn PDF document text
    • http://rusedaboz.frackfreefoothills.net/uploads/1/3/2/6/132682137/ef051fe87e.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/1/0438/0416/4257/files/57423440454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/gukipupudotibete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7031/files/lisezefijirelubufisole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/faralasut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9697/7051/files/consumer_reports_blenders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8941/8657/files/sukeviwizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/lijarerakolajagubepuganu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/59529795471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/12541240196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/vasubuvowituvopew.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8652 5524 bytes
SHA-256: 31d02dd6d554e05f11b6d8ae813e35e8d25b5b4bd9daf9a0454ee52afe5033bb
font_01_sfnt_off000098fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FE 14872 bytes
SHA-256: 9be89dd09fd894747c00c4666714d4706f623a847067322a95642423f603ab37

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