Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f13e8c3c1c1cdb…

MALICIOUS

PDF

49.4 KB Created: 2020-08-12 20:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9c2176951abf3f11c5b5852871f9b2c SHA-1: 7eee07e741f7c886bdac5d14968350e76309b855 SHA-256: 79f13e8c3c1c1cdbb469d4d44f5381185ab02bcb79f054da38a2a35336695a65
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'simplifying algebraic fractions worksheet pdf kuta' and a URL that appears to be an SEO lure. This suggests a phishing or scam attempt to redirect users to malicious infrastructure under the guise of providing a free educational resource.

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=simplifying+algebraic+fractions+worksheet+pdf+kuta In PDF document text
    • http://fuvefugi.handsbyhairitage.co/uploads/1/3/0/7/130775732/4411500.pdfIn PDF document text
    • http://files.envirolawteachers.com/uploads/1/3/0/7/130775528/3ba7ca2.pdfIn PDF document text
    • http://files.affinity-artwork.com/uploads/1/3/1/6/131636891/bobawidoxe_kowatex_rofokarujakavez.pdfIn PDF document text
    • http://xelamukun.bradenriverhsmediacenter.com/uploads/1/3/1/4/131406717/vejok-wilori.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/1/0431/8884/6753/files/mobopavuride.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9343/0177/files/la_ballata_dell_amore_cieco_spartito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/962189324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/wow_the_oracles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/kafodedugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/18406886395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/8832057101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/fixifajajutaresabebune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/jefexinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/83401475289.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_off0000808f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808F 6068 bytes
SHA-256: 6a5bc5b2397a6965f032e6569521d00d3be14e8f40fd14632e7934c4db67fef6
font_01_sfnt_off00009516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9516 10508 bytes
SHA-256: 9cb5da9dfb9dcc6793aa7c8483ee9ac384713d012af8ba89c3e4e6bc40c1887e

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