Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7171c9398b00b02…

MALICIOUS

PDF

39.4 KB Created: 2020-08-31 23:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aea49af1edb35799e310a8893b9388d SHA-1: 453ef7362662c1706a5f2be8a2e264d487af586c SHA-256: c7171c9398b00b02bd95fe7f90bf79d951b29a5bcba596ed96c9b70887b7ee49
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious URL, disguised with text related to cancelling a Spotify subscription. This indicates a phishing or scam attempt. The PDF also hosts a large number of other links, many pointing to Shopify, suggesting a link farm designed to distribute malicious content or improve SEO for malicious sites.

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.ru/pify?keyword=cancelar+spotify+pelo+app+android
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/learn2serve_test_answers_tabc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/lupavaxowasigeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/sazebexedilesex.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/mupobinabanesivo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/bovuzomuri.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_aae01a4fb41f4785a95d0f7a5121958f.pdf
    • https://static.usrfiles.com/ugd/79e0dc_ad8d4af5d8584814bdb5ebf690d0b18d.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/exercicios_de_atomistica_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/candy_convertidor_a_word.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb3.bin
1d5ba045a93a0835084268eba0c4c58c8ceccef355466f4e1f64a46cf38c02c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 5156 bytes
font_01_sfnt_off00007053.bin
e4358068a74b2ae5b305af0de8d1a81df038a8459a6725580e64f1870b63d35c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7053 9576 bytes

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