Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5b4919630433db…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 20:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bf381571d055aa960c4083535ebf801 SHA-1: ba86f9ee4fa51b70b39919d8178d5e467dde4616 SHA-256: bd5b4919630433dba3f61b4185e554283e63881d2468933bf4dc54f3bf5ea9c4
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=youreporter+maltempo+brenta'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs hosted on Shopify. The document body, though heavily obfuscated, also contains the same malicious redirector URL and several Shopify-hosted PDF links. The primary intent appears to be directing users through a malicious redirector.

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.cc/pify?keyword=youreporter+maltempo+brenta In PDF document text
    • http://rikukeru.globalpassports.co.uk/uploads/1/3/1/0/131071252/9b1feb9c99d12.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/1/0431/5535/7852/files/39431002600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/libro_de_acordeon_de_botones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/california_dreamin_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/88924892845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/munimuxakofaxoforezotet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9624/2331/files/83385622456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5896/8229/files/ielts_speaking_band_9_sample_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/87503942828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4335/4781/files/novela_los_de_abajo_de_mariano_azuela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2159/0951/files/4782217131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/biology_cape_syllabus_2020.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
🗂 Part of campaign: lauriebmorse.com 3 samples

Related samples 1

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_off00005f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 4888 bytes
SHA-256: 252753b9e821935160879f8efd4bde318ddda2fadab4ceb8457fe0060f3f6175
font_01_sfnt_off00006f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 10840 bytes
SHA-256: 53eefa700c0560bcc92387fd8fea4e4136d8d18a0d810d2a40782411b24eef57

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