Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafdd98596a2e06f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 16:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48991226e4b17d24e05f7d0f3086bf99 SHA-1: 59154973c681870cc707748a2669bc12ea9fd9c5 SHA-256: cafdd98596a2e06f464eddf8274928b316f9d2409136b3dae21822499a68f3d4
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and appears to be generated by wkhtmltopdf, a tool often used to create SEO spam or phishing documents. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to leverage legitimate platforms for link farming or to disguise malicious intent.

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=que+es+un+antivalor+pdf In PDF document text
    • http://files.jannlphotography.com/uploads/1/3/1/4/131453365/8f86d8b12933.pdfIn PDF document text
    • http://files.thegreybirch.com/uploads/1/3/1/0/131070374/7090648.pdfIn PDF document text
    • http://takebum.pacific-solutions.com/uploads/1/3/0/7/130775129/tobijejofegedet.pdfIn PDF document text
    • http://files.aprilsandersphd.com/uploads/1/3/1/4/131407705/somoj-pixinodi-jefalazufog.pdfIn PDF document text
    • http://files.sierralovestowell.com/uploads/1/3/1/0/131071298/1f05af97.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/1/0437/6359/7473/files/contoh_putusan_arbitrase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/problem_solving_method_of_teaching_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/ruvunekaxavofetuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/90042170593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/22070173001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/fovewonazebopejimowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/definition_of_induced_abortion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/bisetumabizexodebagoxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/anna_and_the_french_kiss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/nos_gba_2._6a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/tabla_de_verbos_auxiliares_en_ingles.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_off00008091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 5156 bytes
SHA-256: 5c5795141ca4d44eb4e1f7f107c198dfc1fee3eb83e1f660f594c87f2874b28c
font_01_sfnt_off0000922f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 11076 bytes
SHA-256: ca0cbf12cf1dcf15fdae713af36ae0f8dbd0ea27991634dcc6f3f9466135d326

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