Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8aabf6acd10a86d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 12:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02b4cfac010bfe26ab29e1d70ac172c3 SHA-1: 0eb0c20e939981fbd3c54d8e155cc15d32a4d061 SHA-256: c8aabf6acd10a86ddcd86602e05430581cd1efaaada011e16922f3d6e5f911f2
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and several benign-looking Shopify URLs, suggesting a link farm or redirection tactic. The primary heuristic firings indicate the PDF is designed to redirect users to malicious 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=amino+acids+structures+and+classification+pdf In PDF document text
    • http://files.learningdifferencesresourcegroup.com/uploads/1/3/2/7/132740445/wodisemunisipo.pdfIn PDF document text
    • http://files.benes.edu/uploads/1/3/1/6/131636719/166fe13eb916.pdfIn PDF document text
    • http://files.anfdesigneddomains.com/uploads/1/3/1/4/131408465/d480d5fa.pdfIn PDF document text
    • http://nulexaxub.dragonflyphotographyceramics.com/uploads/1/3/1/6/131637814/5646035.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/1/0431/2953/6676/files/nuvowejawalofapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/velakimolurudebumojati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/bexemujavalubosuzijetuvex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/zitenejevuxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2647/2347/files/60956685529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/11403722180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/arrancame_la_vida_mastretta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/90131590309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/31957541447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/how_to_install_far_nier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/gaboviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4536/2591/files/pdf_cv_maker_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/simadigojimeraxa.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_off000064cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 5288 bytes
SHA-256: ba234988f6abb29b7cd1b35da02c80196f617810fbaea9069c8fc32c814c4594
font_01_sfnt_off000076b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B2 9584 bytes
SHA-256: e37805f6b492a3cecf0474e4a1132dde1348c66f044305fc03c4d541274545a4

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