Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c986d3dcad7d31…

MALICIOUS

PDF

37.4 KB Created: 2020-08-23 20:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0fd8d71b3c251f8ff39c136ef04389da SHA-1: 97f9d04068c91b631754fa46e2e5cb82d97b632c SHA-256: 78c986d3dcad7d31a072ba01508609832dcb7768973ad17c1d84b2ae3cbf64f3
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body text, though garbled, contains a URL that appears to be the primary lure, directing users to a site that likely hosts a phishing or malware payload. The ML classifier strongly indicated maliciousness, and the presence of a redirector link supports a phishing or social engineering attack vector.

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=sharepoint+calculated+field+date+format In PDF document text
    • http://files.jguerzonpictorials.com/uploads/1/3/2/7/132740423/pivara.pdfIn PDF document text
    • http://files.hangmansdrop.com.au/uploads/1/3/2/7/132741709/tafexolemu-giwegemetu-vofomeki-lodanevofitejon.pdfIn PDF document text
    • http://sifufepof.mahakaitreasures.com/uploads/1/3/1/3/131381241/vakozekurame_mukale_kafam_libuwasi.pdfIn PDF document text
    • http://files.cocewl.org/uploads/1/3/0/8/130874526/cf3022.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/1/0451/1003/4597/files/instrumen_akreditasi_puskesmas_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4419/2675/files/borderlands_3_pc_performance_optimization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/kolimiraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/chief_keef_dont_like.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/bebuzukevugetewanulukap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/58042548253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/tifalotevunilererexupire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5694/3524/files/xewataginamedagupemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2209/6283/files/toruro.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 8

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_off0000550e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x550E 5320 bytes
SHA-256: 61d939bc13fa6b8d7126fb428cb974bb37addd8f7292944fb368a1c1776e836c
font_01_sfnt_off000066f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 9944 bytes
SHA-256: a0ab77e9e83c6fc932aaa260d0a484b962b4cb5401bed6d0fdc1de2533fd64b9

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