Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0315a188ecce2a…

MALICIOUS

PDF

50.3 KB Created: 2020-08-06 00:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 888468f307b2281b27d3f14c273a436e SHA-1: a6324345f188223c202bac591358498380c1cf79 SHA-256: 4b0315a188ecce2ae5fcbbe9da5edb9af10223739b7b409f4334811e22c68e7d
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=8th+grade+math+practice+problems+pdf'. This indicates a social engineering lure, likely to direct users to malicious content or phishing sites. The document body, though heavily corrupted, contains the same keyword, reinforcing the lure. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt.

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.com/pify?keyword=8th+grade+math+practice+problems+pdf In PDF document text
    • http://files.positivelypolyanna.net/uploads/1/3/0/9/130969390/vinopojonapolup-pefamepi.pdfIn PDF document text
    • http://zotolufa.uaassociation.org/uploads/1/3/0/7/130775320/kopuriw.pdfIn PDF document text
    • http://files.starlit-lands.com/uploads/1/3/0/7/130775387/pukudubipi.pdfIn PDF document text
    • http://files.hairandmakeupbyalicia.com/uploads/1/3/0/7/130739309/5defd.pdfIn PDF document text
    • http://files.laciegandyphotography.com/uploads/1/3/0/7/130739693/rujezofi.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/1/0440/5025/1941/files/toduwepepadutefefozoturuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4882/7040/files/26877762056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/busonid_spray_nasal_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/fomixizifusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/muwajotisoselasud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/juzisodobimalelavipomodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/9918/1476/files/ecology_textbook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/97539788959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/76299251603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/74485778925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2343/files/50509459291.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_off000085de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DE 5808 bytes
SHA-256: 7182bf55739dc46941276a2faa1a2c77664ea0b97b1958e00c9bb969d2e7df67
font_01_sfnt_off0000996c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996C 10152 bytes
SHA-256: c22640fb6ac183a04b15535f96567c1231424065430bd6c4f017af788bcc73e8

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