Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe33502651f2bf…

MALICIOUS

PDF

33.2 KB Created: 2020-08-06 13:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ab3b991b0969bf0ccbde943216e1307 SHA-1: e31cc44c3bbe078bff621670dd805fa8c2d4cb6a SHA-256: 07fe33502651f2bf3365463e6832e96ad03377c6db1241847a8afbdc1883d07e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as free downloads for technical books, but it redirects through a malicious infrastructure. The primary redirector URL is `https://ttraff.cc/wb?keyword=radiobiology%20for%20the%20radiologist%20pdf%20free%20download`, which is flagged as a malicious redirector. This pattern suggests an attempt to lure users to malicious content under the guise of legitimate downloads.

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/wb?keyword=radiobiology%20for%20the%20radiologist%20pdf%20free%20download In PDF document text
    • http://files.srvgermanschool.org/uploads/1/3/2/7/132712006/e2e316a3.pdfIn PDF document text
    • http://files.rpnsottawa.com/uploads/1/3/1/4/131454345/5472583.pdfIn PDF document text
    • http://files.plentycanada.com/uploads/1/3/1/4/131453395/kegoj-nanoxipisuzes-jexowubomivej-dekafimofow.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/1/0433/1651/0873/files/ashrae_fundamentals_handbook_2017_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/10058542244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/learn_english_speaking_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/97191557517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4485/2127/files/tecnicas_de_afrontamiento_emocional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/59734683150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6442/5634/files/36085657758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/askep_hernia_inguinalis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/80568095782.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 3

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_off00004357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4357 5644 bytes
SHA-256: 7d44f83c3ebe41b6d8f9f8a7729f28ca4345a71e2bb16235aeb83ce68faf2b13
font_01_sfnt_off000056a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A0 9756 bytes
SHA-256: c94d1cdbe59bfdb61924948a338bb840a4ad63aabeb33a61b18f1a49bc402db8

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