Malicious PDF — malware analysis report

Static analysis result for SHA-256 383ecb1c7d6f4269…

MALICIOUS

PDF

31.8 KB Created: 2020-08-06 16:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab5983ba151a59d2ddb404ad7543cdb2 SHA-1: a06b14686c454648740225e19513b11618f178c1 SHA-256: 383ecb1c7d6f4269d1541fc9a448c687933be83904a80a8002a2485d4070aee6
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a book download. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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=boundary+element+method+book+pdf In PDF document text
    • http://files.designtimegnc.com/uploads/1/3/0/8/130874587/pogerujumi.pdfIn PDF document text
    • http://files.mountainvalleystudios.com/uploads/1/3/1/1/131164273/2306d.pdfIn PDF document text
    • http://womeb.ericbrittmusic.com/uploads/1/3/2/3/132302872/kogapak_mukisanukugu_xupoxekaxubuko_mupezir.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/1/0437/7097/0274/files/ledorerifadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/23590961905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/wufopuxepaloparegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/wafupixeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/zozawipelajofuponefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/rebokejevozabovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/desi_hits_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/sipufexijesug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/js_force_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/gixeforirovefinosulewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/zinoludeponatamomokej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/nolemuseni.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_off000041f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F0 5456 bytes
SHA-256: 7900158ea2b8d7238d26b2580ddc7a9a8ac70baaa29a901c53428fcd674ce257
font_01_sfnt_off0000545c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x545C 8768 bytes
SHA-256: 26996427916952a47eaf2a6e46d142b2d595e778e9f3afba3b8d86923a7c3f1f

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