Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae6edf5ee8089af…

MALICIOUS

PDF

43.9 KB Created: 2020-08-21 02:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c3d7ee7a9254d4c8887d3e2e5c2e5c3 SHA-1: 44087c3c47be2e317baceccb50efb5346120da50 SHA-256: 5ae6edf5ee8089afe49a2a443c63e0591330a2b4c441501a65b58c0d12ceab20
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains text related to 'sampling plans' and URLs that appear to be disguised as free book downloads, aligning with a phishing or malware distribution lure. The ML classifier 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.cc/pify?keyword=zero+acceptance+number+sampling+plans+pdf In PDF document text
    • http://files.nsuasda.org/uploads/1/3/1/4/131406811/de6ea517162.pdfIn PDF document text
    • http://files.artdwellers.com/uploads/1/3/1/4/131406369/jerusakesiridaruta.pdfIn PDF document text
    • http://xulin.jacquelineabelson.com/uploads/1/3/1/3/131380344/vawukolu.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/1/0430/4853/4167/files/ccna_wireless_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/trigonometry_lial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/51240398854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/jukatinosovigoxigedoduret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/fanesakiduji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/liwagira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/how_to_calculate_time_complexity_of_algorithms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/4532301990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/pressure_booster_pump.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/operation_management_russell_and_taylor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4637/0471/files/pudedibapimusujup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/76232394872.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 4

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_off00006ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 5572 bytes
SHA-256: 1c69e6274f43de0de4a728bec1c775d8a6bf280e534d0cd99b1814e064421800
font_01_sfnt_off00007db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB5 10872 bytes
SHA-256: a5de3bfe1461e645153bb997c622acd75713e3466d50de1adb801fff6a9ad7f6

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