Malicious PDF — malware analysis report

Static analysis result for SHA-256 13258959f316a27a…

MALICIOUS

PDF

55.5 KB Created: 2020-08-23 17:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e33704876f770aacab4dcb382f34565 SHA-1: 2f1b654dfa0515fe7873ed0429d971dc4c4c08e7 SHA-256: 13258959f316a27abe4fced92f44c4c6108dc22df848497006ff5ce37c7d412f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically `https://ttraff.com/pify?keyword=tomb+of+terror+hearthstone+guide`, which is flagged as malicious. The document body and embedded links suggest a lure for free downloads, likely leading to phishing or malware. The ML classifier strongly supports the malicious verdict.

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=tomb+of+terror+hearthstone+guide In PDF document text
    • http://funifima.heartsofhorsehaven.org/uploads/1/3/0/9/130969723/togajefejiriluka.pdfIn PDF document text
    • http://files.scarecon.org/uploads/1/3/0/8/130874566/29647e00ca1c2be.pdfIn PDF document text
    • http://luxazabej.mitzimileskubota.com/uploads/1/3/1/3/131383664/tevumolekipujot.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/1/0431/7816/4387/files/42468261056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/clinical_biochemistry_text_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1433/9235/files/relative_clauses_lesson_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/texubamebujuwowelifoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/abnormal_psychology_ann_kring_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/88778764695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/cowsep_yi_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/26993283979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/86457565362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/bcom_books_shivaji_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/rofupefijobojixekig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/butterknife_android_studio_setup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/xuvosilagewofuzosodozek.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_off00009baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAA 5376 bytes
SHA-256: de0fccc60e41b9f35ae15333d987a9cc57305bcc701ee9a750c1921c41b32a41
font_01_sfnt_off0000adcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADCC 10364 bytes
SHA-256: fe0289f62007576b54c629ca3332bdac6bca6ff5a7b0f7d218bd7fa9bbefd649

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