Malicious PDF — malware analysis report

Static analysis result for SHA-256 19981d0283074b39…

MALICIOUS

PDF

38.2 KB Created: 2020-08-07 01:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4829ddaf265be6f5c7abebe5b7e92e90 SHA-1: 551f8fee061ff4b12d3349e11149c7b026867aa7 SHA-256: 19981d0283074b39fe604059a1fe2018ba67c1827a796014bfe64d067a8fbaa9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector URL associated with malicious activity. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm designed to lure users with SEO-optimized content, and the presence of a malicious redirector suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the primary redirector URL.

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=elementary+intermediate+algebra+bittinger+pdf In PDF document text
    • http://files.thewovensnail.com/uploads/1/3/2/6/132682042/447de89.pdfIn PDF document text
    • http://files.katshelter.com/uploads/1/3/0/7/130739490/talumixemuxawe-fizetisujuvalap.pdfIn PDF document text
    • http://files.allinclusivetennis.com/uploads/1/3/1/6/131608037/kinepumifuwekeladuva.pdfIn PDF document text
    • http://files.escambialatin.com/uploads/1/3/2/6/132695392/senilix-botuxixigup.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/1/0437/3794/0117/files/77629525948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/guganewixejeridupan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/66986835171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/kosakadaxulukapanupan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/teruxolikepexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/tinogofudokemawikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/33298520568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/dilemipovifibevuvilotize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/potitejuvuluvupedunudegus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/welding_risk_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1510/9797/files/how_to_save_an_imovie.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 8

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_off00005610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5610 5384 bytes
SHA-256: 96be83fe6e4d60af2cfca20ff1d03c2eef2d9f59d9db15493cb2436b6df9b6b4
font_01_sfnt_off00006851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6851 9856 bytes
SHA-256: a093f7b92963dfd0f4c354ecd9a5ece2ee89abb7325898d44483205e35c92312

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