Malicious PDF — malware analysis report

Static analysis result for SHA-256 111533b3f63f6e19…

MALICIOUS

PDF

41.4 KB Created: 2020-09-13 00:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8ac04e4e8bf0872ce4d8504bafb751b SHA-1: 61dee6a74ae2ed85ffd83354806d542cfc3d2339 SHA-256: 111533b3f63f6e19e9b8eaf6d21ed531749a64b12e01f693e8ce94b14187b383
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are identified as part of a link farm and redirect to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users seeking safe APK downloads. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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.club/wix?keyword=is+apkmirror+safe In PDF document text
    • http://files.tetcommunity.com/uploads/1/3/1/8/131871786/244f06cce60.pdfIn PDF document text
    • http://files.redrunebooks.com/uploads/1/3/1/4/131407952/91094534.pdfIn PDF document text
    • http://duvarim.manuelademedeiros.com/uploads/1/3/1/4/131483337/gitenusadota.pdfIn PDF document text
    • http://files.myececlass-safety.com/uploads/1/3/2/7/132740339/lubamifogibuxovawo.pdfIn PDF document text
    • http://nejogix.kikayscleaningservices.com/uploads/1/3/2/7/132740873/405001.pdfIn 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/ea9bdf_3a32dc4cb80a42e1848be50b332089c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/008e52_322f8c177a674dcc8b3a4280fe2fc1dd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dd980_7386ed91f4cc4023bdbb3bb66eef3cc6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/80fd5d_409643530f264615b631f517b3a2b45a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cfbfd2_fdb841fea3c247c5bb9dfb88c6755129.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3225da_d1ddd8e3e9a54679acc9ee9a6b0c204c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1b8d0798de2a4789a4b0b27ac73622b5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb3bf9_f155250174be4280a8dccc0d6cfb3c77.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c12414_bc7bb42babd44b8bb738a60c9b6564ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d21c0_af8025ee3f4d4b1b8919335cd6d322eb.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 7

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_off00006433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6433 5016 bytes
SHA-256: 453f60db929e03798fc08109f09336202a9e5680aa656f231a7ac81361a154a6
font_01_sfnt_off00007532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7532 10444 bytes
SHA-256: 2b662c25a194230e2f00722d10f07a2b95aa751f534a2233fab93a0d5e7cd47a

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