Malicious PDF — malware analysis report

Static analysis result for SHA-256 6397062cdb9a7403…

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 22:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ad09c6ba9a5ff8348b7416e44407e91 SHA-1: 3dadddb2413da9c3e71f573419dc91babde6b66c SHA-256: 6397062cdb9a74033edbb367ca4b428c821e549d4c4cc2fc148f3289d35b5843
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to a known malicious redirector, disguised as '10th grade math worksheets with answers pdf'. This suggests a phishing or scam attempt to redirect users to malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=10th+grade+math+worksheets+with+answers+pdf In PDF document text
    • http://files.alaalohagirlsstate.org/uploads/1/3/1/4/131483148/musajorudubeve_xalabemezego_rudelezu.pdfIn PDF document text
    • http://files.weavermotorsportsinc.com/uploads/1/3/1/4/131407977/7a769de.pdfIn PDF document text
    • http://files.pandakungfucenter.com/uploads/1/3/2/6/132695639/xageraw.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/1/0430/6881/7562/files/57478693940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/fagitemelibutisatidizuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5356/2526/files/nijamulepodabiman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/wifomokebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/rabofopinometunexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/36077978479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/48995766622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/62197174320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/56628016258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/17247629001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/82668800267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/1728008441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/wow_fight_club.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 2

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_off000065df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 5680 bytes
SHA-256: 2b3613f831dba983fc5352a15708ec16365a233c52c4dac0b7acfbd771476112
font_01_sfnt_off00007926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7926 10108 bytes
SHA-256: df3f51225c65cfca301189593382fa4267d74e1e242fb03ef1b1884256d40e6a

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