Malicious PDF — malware analysis report

Static analysis result for SHA-256 13da0049a1e09d67…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 07:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea421416d9e6144d7db3911af3a6329d SHA-1: 21e3a7eab40e894eb46e35c545b5ab6c7ee3e4f3 SHA-256: 13da0049a1e09d676be680ab948a7b58f217687db120ab689bc0bf7e7142e44d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate book downloads, but they redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a phishing attempt disguised as a free download. The embedded URLs, particularly the one pointing to ttraff.ru, are identified as malicious redirectors, likely leading to further malware or phishing 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.ru/pify?keyword=mathematics+for+engineers+tony+croft+pdf In PDF document text
    • http://files.dwaggy.com/uploads/1/3/2/3/132303009/aea80bcf9d56f8.pdfIn PDF document text
    • http://kajonukix.dawnhomesut.com/uploads/1/3/0/7/130776644/menakeni.pdfIn PDF document text
    • http://jumolepax.grfoodcoop.com/uploads/1/3/1/6/131606552/zivobanirovufux.pdfIn PDF document text
    • http://files.jrasales.com/uploads/1/3/2/6/132695258/sixonefuwowef-tekozodifufa-wuwaga.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/1/0431/5021/3274/files/data_acquisition_system_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/dexijemupivafuridev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/medicamentos_para_la_angina_de_pecho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/fosibasajadopageze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/zabosevonovomesop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/33305202614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3320/5655/files/66477926778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/mokidudamapukiwafobajukaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/vumukakokuwuzawefor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/mysql_uninstall_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/rowubegukisufubovupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8326/7234/files/kefewudekenufan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/lejijof.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_off00006270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 5644 bytes
SHA-256: 3ede8effc02c939eef90925093e21062079ca9c134725ff3ee19c96acf7f4120
font_01_sfnt_off0000758d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 10216 bytes
SHA-256: 04ba06817d423859dcaafc16c07bff55c9c577407f78e3b21f37c73030c3db1f

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