Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d8958b6b5dce71…

MALICIOUS

PDF

50.9 KB Created: 2020-08-13 23:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a453598f1ee807fbe31d1674c3c8192d SHA-1: 11c48f41f93c832e73299d5b1d0fe90fcd49d506 SHA-256: 55d8958b6b5dce71db466bc6b99439669569c0973f95fcfa593d8e197b6abaa2
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links. The primary malicious URL identified is https://ttraff.cc/pify?keyword=format+of+descriptive+paragraph+class+9, which is likely used to funnel users to further malicious content. The document body, though heavily obfuscated, contains references to the same redirector URL, reinforcing its malicious intent.

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=format+of+descriptive+paragraph+class+9 In PDF document text
    • http://fudek.collageofwomenartists.com/uploads/1/3/2/6/132695384/laver-jovanizuzevaxo.pdfIn PDF document text
    • http://menuvajom.thecovenantschristandyou.com/uploads/1/3/1/1/131164250/mukuzegazatawe-jelakixivixo-rogulabat.pdfIn PDF document text
    • http://gotuzofo.hamptonsgarage.com.au/uploads/1/3/0/8/130874284/rajaxavamuwotalomime.pdfIn PDF document text
    • http://files.insulators41.com/uploads/1/3/2/6/132680808/bimarovabotexilukuz.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/1/0428/6971/9196/files/naganimuzipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/pseudophakic_bullous_keratopathy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/51111714107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/32475283256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/ms_excel_2020_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/bienes_raices_mario_esquivel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/download_book_learn_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/makaziwisufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/watch_bad_girls_club_season_16.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/bolufolibivurokedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/2277702841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/75567085880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/83830843239.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 4

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_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 5740 bytes
SHA-256: 6f75f5e77a467c18dac06514433b277a63ebd37817809635ab4a992c5d1b1434
font_01_sfnt_off00009b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B49 10128 bytes
SHA-256: 0f48b53bcf2497c451d819681fbac9cdef2aafb9db65c7c88d21bab5357fb8b8

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