Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c19076f0c2f06b…

MALICIOUS

PDF

39.4 KB Created: 2020-08-25 12:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77586a44752c69081ddcd4d5649878dd SHA-1: e326d00b90732bb6cf08fe5b530cad29885f0500 SHA-256: 71c19076f0c2f06bfefca751f8d3bb0252c99d375cd41e1e9cb23634fb585905
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or malware distribution scheme. The embedded document body text, though corrupted, contains a URL pointing to a redirector, which is also listed as a critical heuristic finding. The presence of numerous external PDF links, many pointing to benign Shopify domains but some to unknown domains, further supports the SEO-based lure for malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=math+worksheets+for+middle+schoolers In PDF document text
    • http://files.stpatrickchurchyk.com/uploads/1/3/1/3/131381679/kepaxawajir.pdfIn PDF document text
    • http://luzowizo.csnons.com/uploads/1/3/1/0/131070588/wopepidubukowas.pdfIn PDF document text
    • http://wewazupa.crossfitkanga.com/uploads/1/3/2/6/132682883/14c4a2.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/1/0428/9835/8432/files/46946939033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/clothes_accessories_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/cursive_writing_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/36269099690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/99992100989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7975/7977/files/72156501808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5515/files/the_secret_doctrine_helena_blavatsky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/87826557987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/needs_assessment_template_project_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/9494476356.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 1

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_off00005b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B57 5420 bytes
SHA-256: 572b8a3dd719a0101c32ed4009a45042bfd1983accb2673bb94d09a6ac4ad023
font_01_sfnt_off00006dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 10364 bytes
SHA-256: 3649f955eddb19aa1a05b9a5e0f0a911dac19f87e2976b72dd0ec4637e1ce61a

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