Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd95bdb87645e68e…

MALICIOUS

PDF

66.7 KB Created: 2020-08-11 23:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa452d05cc33c581d14e91bd422dddc5 SHA-1: d79f2628af2f4a636eeb3904743ff30e2c4f9639 SHA-256: cd95bdb87645e68eaf31212909daa3e2f6283331b49e6ac6a4bf53e1557962eb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other embedded URLs, many pointing to external PDF files, suggests a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=bulimia+nervosa+pdf+articles In PDF document text
    • http://files.thelodgeatthelake.com/uploads/1/3/1/6/131607777/7330166.pdfIn PDF document text
    • http://tafujugi.dynamicfreightcarriers.com/uploads/1/3/1/4/131453541/4623069.pdfIn PDF document text
    • http://bakezuwa.earlygirlfarm.com/uploads/1/3/1/3/131380005/nuregu.pdfIn PDF document text
    • http://files.lumieregardens.com/uploads/1/3/0/7/130776485/3625754.pdfIn PDF document text
    • http://vopeduxoz.sumetfitness.com/uploads/1/3/0/8/130813747/mikokizudite.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/1/0431/6053/5196/files/arihant_books_free_download_class_10_maths.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/pazagozimoxatug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/install_tmux_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/68881104146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/gonabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/integral_calculus_area_problems_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/sistema_de_bethesda_papanicolau.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/administrative_law_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/welodapuzana.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_off0000bacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 5412 bytes
SHA-256: 583a09febb590f283201da37b9462a81fe19676c2e54db8a23f9693095725986
font_01_sfnt_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 15768 bytes
SHA-256: 73e1d6619d6cba2831b6d40a85e1ab8fd340f52608152e1d17b85cbabe52011a

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