Malicious PDF — malware analysis report

Static analysis result for SHA-256 62527f5076292f94…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 20:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98caa34c9ed86ebf0e04896922a916ac SHA-1: 81ef5a662879dc5359c6ef997b63631397e390a4 SHA-256: 62527f5076292f94f3d8b39d762f56c5ec66f4ca44c721cb20e69973bc2cfcbb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, suggesting a phishing or scam attempt disguised as educational content. The ML classifier strongly indicates maliciousness, and the embedded link points to known malicious infrastructure. The document body, though heavily obfuscated, contains the primary redirector URL and several other PDF links, likely part of a link farm designed to distribute malware or lead to phishing sites.

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=jan+richardson+guided+reading+next+steps In PDF document text
    • http://files.nuga-arthouse.com/uploads/1/3/2/8/132815008/mixox.pdfIn PDF document text
    • http://files.esulix.com/uploads/1/3/0/7/130776268/lebuvelejevu.pdfIn PDF document text
    • http://tifimu.tvhsgbb.com/uploads/1/3/1/0/131069992/valagin-ronoruk-nofemepo-dawobeloju.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/1/0428/4622/4551/files/zaxutomufajizagopedazok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/51254754522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/internet_video_er_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/rurivuzagusibupuzuviza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/71443378240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/93963934722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/93706993739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0225/2711/files/avalon_hill_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/96485017047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/89700233470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/clash_of_clans_games_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3441/8072/files/44369617957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0298/5626/files/10405714678.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 5

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_off000071c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 5360 bytes
SHA-256: d381cc4fa96348f4c308efc83f3f72882edf143f0d7c8119b776133a43118d52
font_01_sfnt_off000083f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F3 10972 bytes
SHA-256: b8164ea509e771ac34d6f67a74e443922e5d8bb6a60fd2f3552fd5fc298fbd0f

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