Malicious PDF — malware analysis report

Static analysis result for SHA-256 243557f3c4e60348…

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 01:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51c8bf694ef9954310d31b91e70e3e51 SHA-1: d4f749c2dbf462c8faeafaebde5104d31c1b73a7 SHA-256: 243557f3c4e60348dedbc217183f2f019f7917a49e1cddc7cbe0997791cfd002
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.com/pify?keyword=answering+teacher+interview+questions+correctly, which is a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to external PDFs, suggesting a lure to a malicious site.

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=answering+teacher+interview+questions+correctly In PDF document text
    • http://zoloti.rcherringtondesign.com/uploads/1/3/1/4/131453645/kanikib_suduguzivowus_gowegenuxitideb_mimumabepok.pdfIn PDF document text
    • http://setagoto.frederickpediatrics.com/uploads/1/3/0/8/130874566/dafizigetituwuza.pdfIn PDF document text
    • http://files.swiss-german-online.com/uploads/1/3/0/8/130874489/75ff69bc.pdfIn PDF document text
    • http://files.jacobsarmoury.com/uploads/1/3/1/4/131483488/1641319.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/1/0431/5247/4267/files/kujojoreromutap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/glencoe_algebra_1_standardized_test_practice_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/alcohol_120_full_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3033/9735/files/nekunesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/php_phone_number_validation_for_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/sapulobitexodowame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/hold_me_tight_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/82361398487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/doripot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0757/8009/files/mastering_physics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/guide_to_real_estate_investing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/34688186064.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 7

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_off000064f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 5428 bytes
SHA-256: 4ab42af23c95f0fb2a95212c2e73f6835142d43c15692eede8098828ec63702a
font_01_sfnt_off00007776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7776 9944 bytes
SHA-256: 6bf334ebd62089811dfbaa475515c0fb2fe033b928c41e57b9359a4ae10fc7f8

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