Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb8826236a8e08b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-26 19:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2476c3d829ab2d36824ed437608108f SHA-1: 4a4835cca668b566ebf9b49516cba414f9fa34f0 SHA-256: ffb8826236a8e08bba01944d8066b8554f4c05751af13ed51003fd2bd4efa08d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning technique used to lure users to download potentially unwanted or malicious software, as indicated by the 'drastic emulator pro apk download' keyword in the redirect URL. 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=drastic+emulator+pro+apk+download
    • http://files.rmisuw.org/uploads/1/3/1/6/131637131/gufajerar_poniwase_pemiriwes.pdf
    • http://files.buckinjdesigns.com/uploads/1/3/1/0/131070080/xuniliv.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/wenukokopimuxidoxevajap.pdf
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/96075519717.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/beginner_classical_guitar_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/17295930024.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/zusawiwototikewadirelipa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0645/files/21048883512.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2505/files/zalus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/kitodejetesi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/x_force_keygen_autocad_2019_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/22263920566.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/71558944090.pdf
    • https://cdn.shopify.com/s/files/1/0432/9357/3284/files/66151395479.pdf
    • https://cdn.shopify.com/s/files/1/0433/7011/9318/files/small_alphabet_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/6_virtues_and_24_character_strengths.pdf
    • https://cdn.shopify.com/s/files/1/0430/0475/6121/files/kilotalukumupelenovuwojow.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_off00006af9.bin
1f201242e47d202dc67c286068909f94a04c291142073d0fd5bd3fcff0ea35eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF9 5376 bytes
font_01_sfnt_off00007d37.bin
eb41c5757e4252e7317874b8e0b7ef067ecebdfb685af3203a6fc515bb2a7848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 10332 bytes

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