Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7d4257df1c5eee…

MALICIOUS

PDF

61.8 KB Created: 2020-08-24 01:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0b20e31e16698b365e769960d70bc3e SHA-1: 7312a9152d7513ebb3ee0cd9c2e51c34eec19c34 SHA-256: 8c7d4257df1c5eee60a3f2f643879f46c44e146cba2199b5c4eab3e9e9713ffe
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a title and several URLs, including the malicious redirector URL and numerous benign-looking Shopify URLs, suggesting a lure to download further malicious content or engage in phishing. 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.cc/pify?keyword=spiderwick+chronicles+the+field+guide In PDF document text
    • http://files.wakefieldgarage-doors.co.uk/uploads/1/3/0/8/130813855/9703850.pdfIn PDF document text
    • http://ketator.heritagefloristcortland.com/uploads/1/3/1/4/131453558/6172085.pdfIn PDF document text
    • http://files.trainingoutlaws.com/uploads/1/3/1/3/131398333/bcde270f3c.pdfIn PDF document text
    • http://files.mskenny.com/uploads/1/3/0/7/130776407/pemopotofoso.pdfIn PDF document text
    • http://files.charleslpearson.net/uploads/1/3/2/6/132680986/f15b252.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/1/0434/5076/1377/files/boraks_pada_makanan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/73996097295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/38925980937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0144/1448/files/91406196595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/zonojamebikipukux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/gopazosobuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/the_5th_wave_free_download_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7854/1727/files/acute_myocardial_infarction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/encyclopedia_of_computer_science_4th_edition.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 8

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_off0000b602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB602 5464 bytes
SHA-256: ea1a9a44fc4412e156334094069ed9ef03f2795f5c314178c3456242ad4e710f
font_01_sfnt_off0000c8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A9 9920 bytes
SHA-256: 435aaff5a8cae52b5f6e53c07f315d1d5edd4bf3ec616ca4fe6775e02eb526f3

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