Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda81aadba18ca15…

MALICIOUS

PDF

35.3 KB Created: 2020-08-27 13:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02abcb5a4b7adac9512ad671851b437c SHA-1: 1aec2880cf273aaa0fb2d85b814ad30ab026a98b SHA-256: dda81aadba18ca15e67a754f7ca1a152b612928c7416122957c73352994669d7
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 SEO-optimized PDF files hosted on various domains. One of these links, https://ttraff.com/pify?keyword=kuta+software+infinite+algebra+1+literal+equations, is identified as a malicious redirector. This suggests the document is designed to funnel users through a series of links, ultimately leading them to malicious 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.com/pify?keyword=kuta+software+infinite+algebra+1+literal+equations In PDF document text
    • http://xoveg.bigwhitebarnyoga.com/uploads/1/3/2/6/132681352/1e719c6d106f6d2.pdfIn PDF document text
    • http://files.tracysteinbrookpaintings.com/uploads/1/3/1/4/131482823/7188765.pdfIn PDF document text
    • http://files.jasminayeon.com/uploads/1/3/0/7/130738722/61339e6ecee1.pdfIn PDF document text
    • http://files.advancingstem.com/uploads/1/3/0/8/130873945/3752076.pdfIn PDF document text
    • http://files.hannahfairchild.com/uploads/1/3/0/8/130814056/zunowefinubin-barenojajuve-fibetopiwegobu-tokibiwi.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/1/0434/0980/1365/files/cinderella_2020_screenplay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/summary_of_accounting_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/crimson_peak_movie_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3855/5805/files/munimaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/vokigimirezuxalamawevol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/50306059369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1024/4260/files/fixture_of_asia_cup_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/spc_statistical_process_control_in_injection_molding_and_extrusion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/becoming_jane_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/ratexulawetenuxevep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/tonujezudev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42632515291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/68297768577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/autocratic_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2224/6042/files/25153444878.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC4 5316 bytes
SHA-256: dcb60607b5caf3650344cbc1e2784e105cb66017306739497b1791a589476075
font_01_sfnt_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 9336 bytes
SHA-256: 9feb22d45404ed354fff7a9a63d737126a5ec61b87b8a3431d3e903f4cbba6a1