Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baaade35ceda387…

MALICIOUS

PDF

65.1 KB Created: 2020-08-19 01:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 395cdea7254ecae3068ebbe19acbaea3 SHA-1: c2ea93168899d508f5ed5940527d41c06604c4a7 SHA-256: 1baaade35ceda387c9198d3953ed487b373d5aee57c72145a30aff026f93b7b2
234 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, suggesting a phishing or malware distribution attempt. The document body and embedded URLs point to a lure for a 'Calcutta university ba registration form', which is likely a pretext to encourage the user to download a password-protected archive. The presence of multiple PDF links, including one to a known malicious redirector, indicates a coordinated effort to distribute malicious content.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=calcutta+university+ba+registration+form In PDF document text
    • http://rariju.tedatkinson.com/uploads/1/3/2/6/132681670/merejiforiwujonefure.pdfIn PDF document text
    • http://zewisurif.sabelrentals.com/uploads/1/3/0/7/130775169/vurusurulafafoza.pdfIn PDF document text
    • http://xesuda.maryqueenofireland.com/uploads/1/3/2/8/132814930/wizizala_fopupobilirisi.pdfIn PDF document text
    • http://files.comobnp.org/uploads/1/3/0/7/130738720/1283502.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/1/0435/1868/9434/files/parallel_models_of_associative_memory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/1814/4155/files/vejiga_neurogenica_espastica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/vezowevaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0378/8964/files/sexumenadepomoxubekelonex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/27534439121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/download_logic_under_pressure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/sinasonabufubujuruzemefis.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 5

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_off0000bd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD14 5408 bytes
SHA-256: d15610f740f5833fa05c2785d90baca4b60ae53972e3d00dc582f093458d841c
font_01_sfnt_off0000cf75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF75 12732 bytes
SHA-256: e5e450c747b0a1bcaadd65698ca2d6ef061fb217d12d578d782f7e47f34e3c08

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