Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b7894033aae761…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 00:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ce699d5cdfc94f99c960f8089b0e5e0 SHA-1: ef7d5e6a7dc5cf9021495151038c37c6b3b03bd1 SHA-256: 90b7894033aae761cf73ca661d42013346b8afd2fa7bfe124a110dd2c5c87ad4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=inlet+guide+vanes, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for users interested in technical documentation. The presence of a link farm suggests an attempt to distribute malicious content broadly.

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=inlet+guide+vanes In PDF document text
    • http://dokepu.sungindustries.com/uploads/1/3/0/7/130738730/tudimepik_serogori_sazumelafinene_loxip.pdfIn PDF document text
    • http://files.webdevelopmentbuddy.com/uploads/1/3/2/6/132681378/595917.pdfIn PDF document text
    • http://files.sspeterpaulpassaic.org/uploads/1/3/0/7/130775784/5596887.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/1/0431/4945/9605/files/xefugofavukej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/honda_cb750_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/efectos_del_alcohol_en_adolescentes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/wekojekep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/20715392160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/enhancement_shaman_7._2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/paseribufafudowikajev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/gofijobajepawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/wunepibatawigaxasivopedos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4307/files/bamu_university_time_table_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/mobezaj.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_off00006566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 4896 bytes
SHA-256: 0afa994197450fae011d74bd17d7cb15a92db5d72d05c0dbed38ac5878d57763
font_01_sfnt_off00007623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 10468 bytes
SHA-256: 8c1c174bfdc873e437bd867d451addf1d7a7ea452ccd5424eb1184c254ba4056

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