Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6f50b2fca33f1a…

MALICIOUS

PDF

48.6 KB Created: 2020-08-19 05:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 290c481c5aa8f0cdb3fcd69edd2e8a26 SHA-1: 2d24e3b58d24b095be2bef7170f7989293a33b3b SHA-256: 7f6f50b2fca33f1acec1621e07d084487977ddefa3111dfa9adfaa80e2fe292f
194 Risk Score

Malware Insights

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

This PDF document is designed as a link farm, leveraging SEO tactics to lure victims with deceptive content like "algebra 1 regents 2019 pdf". It contains numerous links, with the primary malicious redirector identified as https://ttraff.ru/pify. The document body itself is heavily obfuscated and contains embedded URLs, suggesting an attempt to disguise its malicious intent. The ML classifier strongly indicates maliciousness, supporting the classification as a phishing or content-luring attack.

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.ru/pify?keyword=algebra+1+regents+2019+pdf In PDF document text
    • http://files.60secondphilosophy.com/uploads/1/3/1/4/131482997/jemajus.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/1/0434/4184/8470/files/17139730064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/altered_carbon_livro_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/refx_nexus_2_download_link_full_content.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/98192705060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/safijewujizajipowosev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/407-_001-_0000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7964/7642/files/26160515480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/40366387408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/xaduxonubonanomugagoverus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/wazededetatifir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/positive_affirmations_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/nejunedubebuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/15798220483.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_off00007d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 5820 bytes
SHA-256: 0c9067ce2a55914db0e89e49d906183ee3555e258dbb969aab65d999fb54349a
font_01_sfnt_off00009117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9117 10868 bytes
SHA-256: baab6ef65edac4971b4c75aa81ab54e5ededd6bbe4b68413bf8c1cfb1dd7103d

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