Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b6cef3cfd9b534…

MALICIOUS

PDF

51.6 KB Created: 2020-08-14 18:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d60c7b39904f8e5d695e0f4a9fdb1654 SHA-1: 2236e77b0f9dae745aace6e13630d2102bb3bb94 SHA-256: 48b6cef3cfd9b534e895815447a7a7cc00d0f2d9ed3596f07afc2bf67964ce9e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The primary attack pattern involves luring users to external sites via these links.

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=spreadsheet+phpexcel+laravel In PDF document text
    • http://files.regisacademykc.org/uploads/1/3/0/8/130814229/285c15679.pdfIn PDF document text
    • http://wikemugi.elementalcapital.com/uploads/1/3/0/7/130775971/durabutiri-jodoxiputowosa-wolol-wobuju.pdfIn PDF document text
    • http://files.dennismccalmont.com/uploads/1/3/0/9/130969577/8f174463.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/1/0430/5171/2666/files/reading_egyptian_art_wilkinson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/84219059481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/nazafejibegeluferofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/allegiant_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/15th_meu_teamspeak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/kejokusut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/83259646569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0828/4056/files/selaniribife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/16468649111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/compare_objects_javascript.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D57 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off00007dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD0 5392 bytes
SHA-256: dbaffd35a09f4b501a168666c106cbd39da33b7b473202739c2f5946c223a355
font_02_sfnt_off0000901f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 2648 bytes
SHA-256: d8b52c9e56f8c3fb806c1aa13a238dcc5d445eb080fc00ac19e6abb7e74d3631
font_03_sfnt_off00009be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE6 10916 bytes
SHA-256: 056b2e730fec839cf3aa29028b86f9834aa1d9b2be9a1133907890d05a4614ce

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