Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b1444bb31d2a8…

MALICIOUS

PDF

71.2 KB Created: 2020-08-05 05:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 591c150f833b59556b92f3b37fd6633c SHA-1: d60ae05235ec1380341ebd8c4a7cf8831c5400bc SHA-256: 618b1444bb31d2a8c4f8d809662d626722a7efbf4910a47d2b60c8cade4dbf49
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and text suggesting a lure related to 'Isabel Allende biography pdf'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute malicious content.

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=isabel+allende+biografia+pdf In PDF document text
    • http://files.neloukeramati.com/uploads/1/3/0/8/130814101/lopisavefegemebivu.pdfIn PDF document text
    • http://files.healingnl.com/uploads/1/3/0/9/130969154/3987369.pdfIn PDF document text
    • http://files.bethmichaelaphotography.com/uploads/1/3/1/3/131384127/mezovadib-tujudovol-fidikowupugeraw-kaxonepiremuwi.pdfIn PDF document text
    • http://files.majormedicalproducts.com/uploads/1/3/0/7/130775373/5519264.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/1/0436/0437/7763/files/6880174127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/2097010372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/75383782173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/85918641590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/51371651741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/putilalitate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2130/2946/files/exercicios_resolvidos_capacitores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5398/files/mebiralulosuril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/cctv_system_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/vuwojuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/zokerosagapotafe.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 7

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_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 5284 bytes
SHA-256: 835b0c2850d6d69644e3495f301b236240d6fd19f86d1d7297439463bf3ee2d5
font_01_sfnt_off0000e965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE965 11900 bytes
SHA-256: 0b2f7b8726d1a564dfde4281fbfe5b272034bd54852ace156a9885b95b90260f

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