Malicious PDF — malware analysis report

Static analysis result for SHA-256 b001a7d526a16b8b…

MALICIOUS

PDF

47.9 KB Created: 2020-08-13 01:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c837e637a7928abd6765deca0c9fecb4 SHA-1: e68ac7d3d44012d12c2895d16feee7e5ed2339eb SHA-256: b001a7d526a16b8b061fa9d167bcbccccbf52ad95551cd7da784547ea3bcda5c
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URL points to a known malicious redirector, and the document body contains numerous links, many of which are likely part of a link farm designed to manipulate search engine results or distribute malware. The ML classifier also strongly indicated maliciousness.

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=abituriyent+jurnali+3+2020+pdf In PDF document text
    • http://files.usamartialartscumming.com/uploads/1/3/0/8/130873995/98d36051cdcbb.pdfIn PDF document text
    • http://files.chaoclimbing.com/uploads/1/3/1/4/131437823/wizobivawopet-tumop.pdfIn PDF document text
    • http://lakux.jmdjewelry.com/uploads/1/3/0/7/130775432/838659.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/1/0436/4192/9886/files/nature_domain_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/alternating_current_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2200/0029/files/falolagenipuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/lufosog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/action_words_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/7498642667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9237/5704/files/error_bookmark_not_defined_word_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/93812999113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/piledudagazobizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3039/files/87310993402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/javascript_create_array.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 2

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_off000072d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D7 5604 bytes
SHA-256: 3fa8fb9df5a2d82f496a27d52f55abcf7f2fae75f0973c17141260a6a4970249
font_01_sfnt_off000085fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FA 15152 bytes
SHA-256: 97d2645367f5184aed55686faab70df220d9a7f903f228e937aace5400e57027

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