Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc73c71e0066825e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 22:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f46177d0f03ab86ffa6cebb20c9d6e8 SHA-1: c33251c56be276ecdee613761fa94b82ecb8d41b SHA-256: bc73c71e0066825eab8922783a26842ebdc4e7c6105a44fda534f55e45c7bad7
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO spam campaign. One prominent link directs to 'ttraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=importance+of+fixed+asset+management+pdf', suggesting a lure related to asset management to entice clicks. The presence of multiple PDF links and a malicious redirector strongly suggests a phishing or malware distribution attempt.

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=importance+of+fixed+asset+management+pdf In PDF document text
    • http://files.davidjohnlang.com/uploads/1/3/0/7/130776826/kitubi.pdfIn PDF document text
    • http://files.tulibro915.com/uploads/1/3/1/3/131398504/lazularerir-lokogotulek-moduv.pdfIn PDF document text
    • http://files.ontheroadarizona.com/uploads/1/3/0/7/130739951/676512500bf6d.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/1/0431/0230/6468/files/pudujepupikipigizufode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/supposed_former_infatuation_junkie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/80298685803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/66162993744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/gazijewizisalijixulelanar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6601/6412/files/gixuvoviwutijixoruguzomaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/33065479633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/67289301741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/antidoto_araa_violinista.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/97705597320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/biology_chapter_1_class_11_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/red_chin_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/nefiwopukejibakegipa.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 6

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_off000071e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 5448 bytes
SHA-256: 1e2dff8e0deed0b3e636371585f168079137bcd2136b1fed58798cc4832e8cc6
font_01_sfnt_off0000845c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845C 10484 bytes
SHA-256: 729e245c87a9560b4e22a93e3c7d9b06ae163ca2bf029fef10ee219f8bd1aeae

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