Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37b08afdeb696c8…

MALICIOUS

PDF

40.7 KB Created: 2020-08-27 22:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 518a79aff4bc892f5ba3643f1f95f729 SHA-1: 5ff55f0626cd9ddbc383ca0600333632c2a47a92 SHA-256: a37b08afdeb696c89435afd1662cbc2c47e2fa9ff440783b744e0076ef6a9a9a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'African american heritage hymnal pdf' and the wkhtmltopdf tool, suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or phish for information.

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=african+american+heritage+hymnal+pdf In PDF document text
    • http://files.bradenriverpirateffa.com/uploads/1/3/2/6/132682030/fuvido_gazukud_xojumekibululus.pdfIn PDF document text
    • http://tigim.johnhofstetter.com/uploads/1/3/1/3/131384635/vojusawipalar.pdfIn PDF document text
    • http://joxumom.jenniferbetteridgephotography.com/uploads/1/3/0/7/130739845/tilibafipoxu_tomorigurenalon_defibolokus.pdfIn PDF document text
    • http://gasopev.stillyriveryarns.com/uploads/1/3/0/7/130738884/bigul.pdfIn PDF document text
    • http://files.avensys.co.kr/uploads/1/3/0/8/130813601/5891987.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/1/0440/6090/1526/files/misapogepazikazugofomoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/jegadovibapuxivojedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/mukakuvefurefoloregaraniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/contract_agreement_template_between_two_parties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/nobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/66388379617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/digegura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/bibliography_sample_for_school_project.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 4

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_off00006251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 5480 bytes
SHA-256: b69a937fb5f3d66412a49dd35fc8d6ee514e75749bdf0f37eb52fc965ccb9aa7
font_01_sfnt_off000074c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C8 9572 bytes
SHA-256: 46feb5617e7e17d5be422423b2a50d2c0f309b0cc2b680d5e590426246c3135a

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