Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da5027024ea29e1…

MALICIOUS

PDF

50.0 KB Created: 2020-08-17 06:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7d7cc23c7c84870d908557ddcdf2e03 SHA-1: 59541104ebd7d3775c768d41306735aab4d568c2 SHA-256: 5da5027024ea29e1f168690057e8fcbfb96c894e97d2c252605ea3f657b9ed39
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=katarina+mid+guide+s9', suggesting a lure to external content. The presence of many Shopify links, some flagged as benign and others unknown, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=katarina+mid+guide+s9
    • http://files.stephgardner.com/uploads/1/3/0/7/130739831/masav-fejibel.pdf
    • http://files.cospempowered.org/uploads/1/3/1/3/131384101/4968865.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/xejuxigovifavuburemomab.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/76875708408.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/brain_teasers_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/60045288787.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/all_bollywood_songs_lyrics_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/tokiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/94596718828.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/curso_aprendizajes_clave_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/entrepreneurship_class_11_ncert_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/48744370909.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/risodezejirewivizepiravod.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007835.bin
c77c6d15f5a1e5e2924d08b9e21a002f9be934a3c41ec5748a7384ed64f0ad8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7835 5236 bytes
font_01_sfnt_off000089e3.bin
a4d165b4a0c54edcfe3f7abca8e55740404f78b564c9c89cdf902ef1bcff2316
pdf-font-stream PDF embedded font (sfnt) at offset 0x89E3 16092 bytes