Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f05d4a7a378482…

MALICIOUS

PDF

49.6 KB Created: 2020-08-24 16:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 778b3187d6f01156eab8f29673b5b72a SHA-1: 7d34ce6a40b4f60abdbe0483874b39e624f56f07 SHA-256: 28f05d4a7a378482ae5acfc1cb654acccb36c7033f3d0bb7e480de503b79ec08
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'apple ipad user guide pdf' and includes the malicious URL, suggesting a lure for users seeking information. The presence of MFA/one-time-code harvesting lures further indicates a phishing attempt. The file is identified as a PDF, and the heuristics indicate it's designed to redirect users to malicious infrastructure.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=apple+ipad+user+guide+pdf In PDF document text
    • http://vezuwig.qualesnest.com/uploads/1/3/2/7/132740249/d7c128eaa04e.pdfIn PDF document text
    • http://files.lestudiosacredspace.com/uploads/1/3/0/7/130776776/8065314.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/1/0433/7549/3271/files/61312797009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/cracking_the_code_interview_6th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/react_js_tutorialspoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/16334092498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/96160618501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6370/5505/files/81976380751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/44500762479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/18962948672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8718/3515/files/19322713640.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 1

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_off00006b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 7708 bytes
SHA-256: f129d9f947c27be7d9f8e8b26bfc22aa96da4cf54106ab1b20d4e16b4f63f302
font_01_sfnt_off0000850b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 5200 bytes
SHA-256: 08e037738af1ff0d7b74035eb863d9a087fa1fc7a2acc5e3a4256a87ca8e650f
font_02_sfnt_off000096c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C2 10080 bytes
SHA-256: 055d2fa2ba59c6ea0cb82c5f884f432ffab51fc83b67eb5a3b53c16703c0a906

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