Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c50237238db1cd…

MALICIOUS

PDF

42.3 KB Created: 2020-08-25 10:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84fdff2d7d924024ce37a859daba106c SHA-1: 215d6f444b8a2daa70984aaa537d1ab87d204298 SHA-256: b1c50237238db1cde0fcc332b0dae10fb98320e4a3f94d90afe189d92f56cb77
194 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a lure for a game mod. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link points to known malicious infrastructure. The document body, though heavily obfuscated, contains text referencing 'Boom beach v 38. 108 mod apk' and the malicious URL, reinforcing the lure. The PDF also contains a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to distribute malicious content widely.

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.cc/pify?keyword=boom+beach+v+38.+108+mod+apk In PDF document text
    • http://files.scfcommunity.org/uploads/1/3/0/8/130814923/rexikofovita_senakenav_dalen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/osaka_train_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4306/9845/files/ledivudijaxuvexex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/fundamentos_de_cero_defectos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/bdl_exam_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/37815498751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/javofuwudeganukeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/sasinesuzubuwumivofatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6913/5262/files/atkins_physical_chemistry_9th_edition.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 3

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_off000059d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D3 5456 bytes
SHA-256: a8f5cece3ef250e861693d03186a2f6eb3de5c1375c06435ac9819199b666709
font_01_sfnt_off00006c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C63 10092 bytes
SHA-256: 9af1eae45e299dc26431d82d6cfa89f37181a836fc19246882e21fac4232ea9f
font_02_sfnt_off00008eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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