Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18314211a1632ff…

MALICIOUS

PDF

54.7 KB Created: 2020-08-18 23:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a96c4e3bda77dc5196cd18b877390714 SHA-1: 8dd7ae1e3107d990a272820bdce5959c384554b5 SHA-256: b18314211a1632ff68f284ba8a7589d7269de74f27e418fd53b5753236bcb754
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as court forms, which leads to a link farm of numerous other PDFs. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which is designed to obscure the ultimate destination.

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=chittenden+county+family+court+forms In PDF document text
    • http://files.berkeleywellbeing.com/uploads/1/3/0/7/130739214/2c010b921ce50.pdfIn PDF document text
    • http://files.troop62306guilford.org/uploads/1/3/1/4/131436978/4759537.pdfIn PDF document text
    • http://legowo.thelearningkirb.com/uploads/1/3/1/0/131069839/zuwad.pdfIn PDF document text
    • http://files.asknehanow.com/uploads/1/3/1/4/131437736/f6e23.pdfIn PDF document text
    • http://zudevi.greensidepublishing.com/uploads/1/3/0/8/130874207/bilonuleje_nisefepavujo_vobopanotepud_pujawusasujoj.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/1/0432/2865/9874/files/sscp_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0215/7466/files/xesamemadifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/gagibimazodilolapate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/75607044830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/php_remove_duplicates_from_array.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7365/8273/files/sample_articles_of_incorporation_ontario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/door_key_tarkov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/zinuf.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_off000096ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EE 5268 bytes
SHA-256: c040af9ac62d133ec02f3f0b70c2776880a2c7b28f40c7017315128e2bb26409
font_01_sfnt_off0000a8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A8 11672 bytes
SHA-256: f639a85d74e5d1408921cf32962d78fc79c1ece073d41e79f378034cc0fbdbd3

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