Malicious PDF — malware analysis report

Static analysis result for SHA-256 103c9c823583a021…

MALICIOUS

PDF

39.9 KB Created: 2020-07-30 15:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8505e22801daa993efb7bdeb7681efe2 SHA-1: f991f23b82a13ff7db8aed2400e2edcad9458ee7 SHA-256: 103c9c823583a021263f3689807678e815c8c9f3a21180f478e4ce128b399b32
194 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure for educational materials, likely to trick users into clicking the malicious links. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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=simple+present+tense+worksheet+pdf+for+grade+3 In PDF document text
    • http://files.opensezme.net/uploads/1/3/1/4/131482950/pivavama-fujafanewawubu.pdfIn PDF document text
    • http://files.mssallyschultz.com/uploads/1/3/2/3/132303388/jogijelajox_sirikag_wugugiwimubapi.pdfIn PDF document text
    • http://files.alisoviejovet.com/uploads/1/3/1/8/131860125/gasidinezoraj.pdfIn PDF document text
    • http://files.130th.org/uploads/1/3/1/3/131379246/779e5.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/1/0431/2065/6545/files/60470217249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/bukuwobibaraburiweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/69733179200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/70328491059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/mavaderinifijuwekas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/5718540634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/dovidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/dedoperafadekibanonabugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/lidegaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/94120183738.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_off00005db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 5664 bytes
SHA-256: e38cc4793211904c774c35bc1ec7be622831f1ac33ff1cf32fdece25deabfa5a
font_01_sfnt_off000070d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 9880 bytes
SHA-256: a61069bd00a1acc84ee565159f6966f6efc602237d2a3646913559c440667ab2

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