Malicious PDF — malware analysis report

Static analysis result for SHA-256 8533b8376881e853…

MALICIOUS

PDF

34.3 KB Created: 2020-08-06 16:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 542e0dcf931a5875012da9560fb37dca SHA-1: 166f56041cff5331c4dd6e13c0bf76d7d1ea90ec SHA-256: 8533b8376881e8533a1cb204ed539db2a179d4369cb30c8dc402df2f8705db83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cg+bhuiya+pdf'. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation or to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=cg+bhuiya+pdf In PDF document text
    • http://files.pamelameans.com/uploads/1/3/1/3/131384249/6959627.pdfIn PDF document text
    • http://files.danyeldevilliers.com/uploads/1/3/0/8/130874134/dabokod.pdfIn PDF document text
    • http://files.heathercarreiro.com/uploads/1/3/1/0/131070336/lonesexepudi.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/1/0438/1055/4016/files/rezatepusabasepazobijoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/54124153620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/vogejax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/11095157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/snow_white_and_the_seven_dwarfs_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/the_giver_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9798/1085/files/3297830915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0560/8099/files/telugu_calendar_august_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3587/2667/files/aquatic_resources_and_ecology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/lesarumiguwizaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/6477658236.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_off00004a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A00 5144 bytes
SHA-256: c331849f9dc4b691cb05dc07ae6b9ab14b13f7f4b423d9c025b464d5c86b91ee
font_01_sfnt_off00005b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B83 9776 bytes
SHA-256: 9b34515f9a215b68839da5501c43fe24f2fc75fc84cff69a5f7898a182ef75fa

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