Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a139f7e70543ca…

MALICIOUS

PDF

48.6 KB Created: 2020-08-14 11:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65f016ddb308561b92f7b60832858f1 SHA-1: 537b4260e7a96b7a9aadb23a0c2fbb4f11e8ee2b SHA-256: c6a139f7e70543cab3b3c5a5406852ec9ba7b24ac3f010ecbf83b27e63f1a429
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=fssc%2022000%20pdf%20gratis'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external links, many hosted on Shopify, suggests a link farm for SEO manipulation to attract victims.

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.cc/wb?keyword=fssc%2022000%20pdf%20gratis
    • http://files.revandmrsrowdy.com/uploads/1/3/0/7/130776401/e8d9a2f.pdf
    • http://kuzivo.thelaurawilson.net/uploads/1/3/1/3/131379312/mezawalikel.pdf
    • http://jodid.girlindia.co.uk/uploads/1/3/1/6/131637814/01fdaf7c3a7a9.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/kexerebodufedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/tevovikasifavoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/weraniganinezefit.pdf
    • https://cdn.shopify.com/s/files/1/0447/8546/7558/files/exercice_math_4eme_nombre_rationnel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/wadeganax.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/atomix_virual_dj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/6359665186.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/nolojidopinatomosu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/dizovazuribonoferogugim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/libro_materiales_dentales_phillips.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/79128550171.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/steven_universe_season_2_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/denazebabavuwedufudedan.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/
    • https://cdn.shopify.com/s/files/1/0447/85

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e0f.bin
c3d0e39b310e732deca061e588b1570186f60e2983bacdeaff43aa2113a2d6ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0F 5520 bytes
font_01_sfnt_off000090ea.bin
e87f5a5b26eae7a31a525a7380a6d923208f88b19e1cffcee2952e602a5ab83b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EA 10672 bytes

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