Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c243c30a5e1c114…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 08:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eea84de7a551b2fb817ffaf0331e413f SHA-1: 7e21eaafaebd4953f8da35fdb976036892e8a444 SHA-256: 7c243c30a5e1c114fe318229c38b5af0bffc0e7ad4ff95b8f211f75ed9a69ff4
162 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains multiple heuristics indicating malicious redirector links. The document body, though heavily obfuscated, contains references to 'cgminer windows 8 64 bit' and a URL that appears to be a redirector, suggesting a lure to download potentially malicious software. The presence of numerous external PDF links further supports a link farm or redirection scheme.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=cgminer++windows+8+64+bit In PDF document text
    • http://files.pedahzur.com/uploads/1/3/1/8/131860204/dixokojif-dajiwozu-zupojaliboka.pdfIn PDF document text
    • http://files.lindenfestil.com/uploads/1/3/0/8/130874257/xofujunokanitit-zowijek-rarefi.pdfIn PDF document text
    • http://faletif.tkccv.net/uploads/1/3/0/7/130776818/lazeketix.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/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/att_uverse_channel_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5604/5981/files/9436306818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/69385977876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/98091438400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9014/4421/files/archer_book_italic_font_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/bobomiregivevobedowikux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/plural_form_of_nouns_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4129/0397/files/caslon_sb_regular_font_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/42888424917.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
🗂 Part of campaign: lindenfestil.com 3 samples

Related samples 4

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_off00005a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A98 5476 bytes
SHA-256: 59aa289a9d97a5115e90322e4cb8e45a722e7164eacb0b2660e526919b4353d4
font_01_sfnt_off00006d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D34 9968 bytes
SHA-256: c4549e2081706adce3d25d8b869d7f57a56d39f92c7802acf862437f3f109046

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