Malicious PDF — malware analysis report

Static analysis result for SHA-256 7412d19acdf03fb8…

MALICIOUS

PDF

52.8 KB Created: 2020-09-03 00:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 238fc1ee382d02c57b4b1653b94695dd SHA-1: 7e758f399a16a74e2c367e0da0cedc60d445f3b3 SHA-256: 7412d19acdf03fb84f2f72661ea555482c8f5bd3aaae42720b6e172ae4e8c31b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded document body text, though heavily obfuscated, contains a URL that points to a known malicious redirector. This redirector likely leads to a phishing or malware download page, masquerading as a lab report.

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=photosynthesis+and+cellular+respiration+biology+lab+report In 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/1/0433/9151/6826/files/fifajinujasilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/gokadevamogusazagafenof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/babiwusitinuvifibog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9679/9384/files/banak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/living_will_illinois.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/faa_far_aim_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/vikaduxojuwebuvixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/sezefelujixag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/audiophile_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4500/8039/files/calisthenics_workout_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/vuzisinexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/biennial_update_report_upsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/genetics_notes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5651/9585/files/gumuvezatomulari.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 5576 bytes
SHA-256: 1b39c66a19949fa1202fd09dd6ee5fca865577f412282c3c10f5973742406e03
font_01_sfnt_off00008bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCE 10772 bytes
SHA-256: 8c7bd90aedb08e340d7e7c28f80ad525cb7f1f50226186e24c2da4dc173ae524
font_02_sfnt_off0000b0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CA 16084 bytes
SHA-256: 492b72e9e8f0bcef963ad10e88f80b5598216a8c56d4f3a27963a6a5716a4957

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