Malicious PDF — malware analysis report

Static analysis result for SHA-256 675faef00a971fcf…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 00:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f68d163dae8a66d0639161226b5570d SHA-1: 8f2d7d61a02a3c58e7469ca4b68c0cb06a326849 SHA-256: 675faef00a971fcfd03e8dd3f1eaab813eaa4e4515cf3f5f672814769112731c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to attract users seeking specific documents. This suggests a phishing or malware distribution scheme where users are enticed to click malicious links under the guise of a free download.

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=cephalohematoma+vs+caput+succedaneum+pdf In PDF document text
    • http://sixap.learnwelshnow.co.uk/uploads/1/3/2/7/132740285/1943737.pdfIn PDF document text
    • http://files.commandcg.com/uploads/1/3/2/6/132695714/limokonof.pdfIn PDF document text
    • http://files.litchfieldarc.org/uploads/1/3/0/9/130969761/1465000.pdfIn PDF document text
    • http://files.greyhoundadoption.ca/uploads/1/3/0/7/130776386/aadf631cbd83243.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/1/0430/3293/6605/files/tabla_de_derivadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/walobedodisukuvav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/set_theory_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/support_vector_machine_kernel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/67133189184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/gofugazenuzax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/karawisitufasodofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6451/5994/files/54391551670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/fipawovutixowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5906/7557/files/zogaganugafozoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9336/0801/files/lista_swek_angielskich_b2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/51454949272.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 5

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_off00006fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB5 5264 bytes
SHA-256: 7bff6774540d682ceebd8fa1bd08921ec88959741ac03b8613df947a77b375bb
font_01_sfnt_off00008188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 10352 bytes
SHA-256: ebb980b41b673495091c7b8aad60e8153645267ce2b7b148abc73c325e7a3d97

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