Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76d99300a1202f6…

MALICIOUS

PDF

66.1 KB Created: 2020-08-03 22:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 846ec46b1c5dae763cb464e56bb7e1ac SHA-1: 89ed50af555d1ddba09cc597f2a7fc7496a4b247 SHA-256: c76d99300a1202f6325e0d970ec95b4612197e29f46b5a9d27402efb46c0fbd0
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the URL that is also present in the critical heuristic firing. This suggests a phishing or redirection attack designed to lead 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.ru/pify?keyword=lightning+arrester+for+building+pdf In PDF document text
    • http://files.yinstillyoga.com/uploads/1/3/0/9/130968942/257b0acbb3f86a.pdfIn PDF document text
    • http://files.sinergysports.com/uploads/1/3/1/4/131438308/daloxotuxedomamomi.pdfIn PDF document text
    • http://files.theyellowdoorstudio.com/uploads/1/3/1/1/131163599/0a018c95cf2320c.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/1/0432/5824/9376/files/fupanonemuwuwez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/kowesufarubedef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/xewirokopag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/pelofir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/36640915867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/1572483740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/33403421980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/54106634294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/83048952495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/maya_extrude_along_curve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/tujisotuziwunaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/99369697619.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_off0000c163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC163 5384 bytes
SHA-256: 0ec681c3591012878567e3379eccbc1422168c8792897ee1255ec0b89b3a5d76
font_01_sfnt_off0000d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 12008 bytes
SHA-256: 86996e92ec0490744606c09de59f1081e343214ebfa3d7449660e2f0aacf0fcf

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