Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b1e3e770263642…

MALICIOUS

PDF

58.1 KB Created: 2020-08-15 06:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cf20fa5721dfc339149b65a10885210 SHA-1: aac139c6a8fd7e1ef4ceda7c711b664c8a794dd9 SHA-256: 49b1e3e770263642baa4efa7f1557d0774187202f3e662f48f69302f9cd3dae4
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'school uniforms pros and cons essay' and the malicious URL, suggesting a lure. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, indicating a link farm or redirection strategy. No scripts were extracted from this sample.

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.com/pify?keyword=school+uniforms+pros+and+cons+essay In PDF document text
    • http://files.mstaconference.net/uploads/1/3/0/7/130776334/2166463.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/1/0431/2812/7645/files/convertir_archivo_cade_simu_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/asme_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/jixanubepag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/67976915722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/greatest_form_of_flattery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/restart_bootloader_pixel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/79776066687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/manual_access_bars_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/lekasogoxobamitogov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/how_do_i_convert_lbs_to_kg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/44827211078.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 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_off0000a3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BC 5600 bytes
SHA-256: 0d8a693aa027d091ba0cd16c6fa870af33916fc935184654718306ed78a0e9a1
font_01_sfnt_off0000b68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68F 10760 bytes
SHA-256: 77432de75a8506d1a1b9fee48ca4be798461ae1b2ca50c4f1d1cb09b888dc41f

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