Malicious PDF — malware analysis report

Static analysis result for SHA-256 7583cbcda0afd96e…

MALICIOUS

PDF

52.2 KB Created: 2020-08-04 23:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 023121f608dc10158e8b99715d16d7a4 SHA-1: 4395fb30c06b7fb8f02a71b70972c08611f59373 SHA-256: 7583cbcda0afd96eb4b0160334f587f5fb71351f6e903db39053ea2509c89296
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests a phishing or scam attempt disguised as a document download, leveraging a link farm to distribute the 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=el+quijote+apocrifo+de+avellaneda.+pdf In PDF document text
    • http://files.familycenteredconsultingservices.com/uploads/1/3/1/6/131607158/lifewe.pdfIn PDF document text
    • http://buvarib.patinamarquet.com/uploads/1/3/2/6/132683188/kufutivobafimax-feviw-wugazetojudubug-dofikedamabil.pdfIn PDF document text
    • http://files.ccmein.org/uploads/1/3/2/3/132303092/5909107.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/1/0430/8529/9874/files/gewojunowekifamofewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/dojudefafubuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/40417968525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/pegasukubugaluxisuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/7990631010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/2k16_vc_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/fusalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/76822827161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/axel_f_midi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8188/9960/files/analogias_numericas_y_graficas_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5700/5222/files/98070629227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/59582145790.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 5

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_off00008b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 5220 bytes
SHA-256: e60dfb7d53c9ebac6463c7cff2e4527f8cfd90900ada4c2abd5dbff3e93ec300
font_01_sfnt_off00009d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4D 11368 bytes
SHA-256: c409c78459c7fc09181f8980f8485ccb13597cdc927a943701cf43cf6309131f

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