Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f9e3dca4c86f7c…

MALICIOUS

PDF

47.2 KB Created: 2020-07-27 09:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ed55f8295cf8bec4c4690edff3882bb SHA-1: ada9425c061156b72dbcd9c2999fb31186695998 SHA-256: 16f9e3dca4c86f7caabe225654d0c57067385f0735b94d032a5d32a16ec5ab6b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links pointing to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to educational materials. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content, likely a phishing or malware download page.

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/wb?keyword=capitalization%20worksheets%20for%20middle%20school In PDF document text
    • http://files.spectrumpsychological.net/uploads/1/3/1/3/131379301/konuzerat_solavexikedonu.pdfIn PDF document text
    • http://files.usna99.com/uploads/1/3/1/4/131454316/edfa8.pdfIn PDF document text
    • http://files.yorkhomebrewers.org/uploads/1/3/1/4/131438582/37207e4820.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/1/0437/1267/5990/files/50952331667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/mowuzisebebonexajogepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/98111068611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/39729292001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/67393474151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/runaguselelijukogasusitup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/48983473560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/3930701573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/wirelose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/ligirutixigunevomugomuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/82490210643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/sazebodamojozufus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/lawatoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6618/files/67908863553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/wefilalosiwidoteneka.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_off00007aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEF 5412 bytes
SHA-256: bef35ceeaecf3f778df42445863aadce485e75c3ec40c5299ba67d779df58444
font_01_sfnt_off00008d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D44 10028 bytes
SHA-256: 8d068c6eda7e369f8b16beb6161b5e9516a678cb41ee568da0d4b3416a551b2d

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