Malicious PDF — malware analysis report

Static analysis result for SHA-256 a824d6ad799b57c3…

MALICIOUS

PDF

63.5 KB Created: 2020-08-03 03:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1b4fa1c55704912778cc22ae98d7b3d SHA-1: 83b723d8382a14a43a4c7e691f5b29335f60e028 SHA-256: a824d6ad799b57c378c460bb9d5f8b19a1bd81dd9c6d4f738d809578c09aee89
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate book downloads, but the primary link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, indicating a phishing attempt. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=contemporary+sport+management+4th+edition+pdf In PDF document text
    • http://doxoviped.traeblanco.com/uploads/1/3/0/7/130739718/5536785.pdfIn PDF document text
    • http://files.tallahasseemetalroofing.com/uploads/1/3/0/9/130969045/lilijemewunakupite.pdfIn PDF document text
    • http://files.burmusik.com/uploads/1/3/2/6/132681885/xetemedakaji-zesuzuzimed-junawizevona-suxutuvixane.pdfIn PDF document text
    • http://files.blingattiphanys.com/uploads/1/3/1/1/131163846/8613768.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/1/0431/2183/6193/files/7919508260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/85848992831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/ziwevukudaruwomeduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/98603979406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0751/6578/files/zetadasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2315/4850/files/python_dictionary_to_csv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/lizowabevif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/17910225652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/fegodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/devotukefapilaxakokalixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/40942528440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/neruzibutogetifupajive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/4._3_vortec_engine_diagram_download.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_off0000b1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A9 5520 bytes
SHA-256: 06b82eda2d6331294cbda0ab7798ab53dbaac315275cf3006f567df5c74f256b
font_01_sfnt_off0000c44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44E 14436 bytes
SHA-256: 5d400d0056ca9594223cf5a732f43410d59d58a7c2a031000b219d65019aace4

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