Malicious PDF — malware analysis report

Static analysis result for SHA-256 b193c731290e83c4…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 18:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2b09bf2eae9e4842ba261b76d67bad3 SHA-1: b4125913bf3a9563b29ff8a32dc644b5f0652c53 SHA-256: b193c731290e83c49bf5e3b6bf0ed59edc5a5961d892e67f0f054c122555b0eb
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs and one critical link to a known malicious redirector at `https://ttraff.cc/pify?keyword=adelphoe+pdf+terenzio`. This indicates a phishing or scam attempt designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=adelphoe+pdf+terenzio
    • http://files.lorrainerastorfer.com/uploads/1/3/2/6/132681878/rawubafosovinitulo.pdf
    • http://files.godsvineyardchurch-london.org/uploads/1/3/1/6/131607010/kexasukeleg_tojivofiwod_kegasiwufus.pdf
    • http://files.mrgibsonsvhs.com/uploads/1/3/0/9/130969254/5bdc26.pdf
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/blender_select_all.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/35107057443.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/96333881489.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/present_simple_tense_exercises_for_beginners_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/6747/2037/files/vubelenujaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/7454/1981/files/49733840940.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/vasofudujisiniloju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/16779319054.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/pumatebabibeditezilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/wipoduxafibusofi.pdf
    • https://cdn.shopify.com/s/files/1/0449/7742/2494/files/affairscloud_paid_free_download_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/80905824552.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/1/0438/6747/2037/files/vubelenujaza

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006765.bin
80030ee298fdda23551c19e25c56823db6d774a5e90fde6e677efe5e608c95a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6765 4780 bytes
font_01_sfnt_off000077a4.bin
254cd20c97b88325d04fd811e5f8515d8ce317a44b9d64df4cd6276f94df0fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A4 9600 bytes

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