Malicious PDF — malware analysis report

Static analysis result for SHA-256 c976da23e9c4f1bb…

MALICIOUS

PDF

47.0 KB Created: 2020-09-01 04:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17a067a9d37a455ce079dc47f448f417 SHA-1: 211a6307457769a39311088b1f75af7f8cb37140 SHA-256: c976da23e9c4f1bb0e67671d8bedfb19163bbcb4168f54fd1d6d630d50727dd7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, including a critical redirector link to 'https://ttraff.cc/wix?keyword=red+bus+ticket+format+in+word+file'. This suggests a phishing or scam attempt designed to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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/wix?keyword=red+bus+ticket+format+in+word+file
    • https://static.usrfiles.com/ugd/ab63e3_bea963c0ae9c4f78a50107057c3bd720.pdf
    • https://static.usrfiles.com/ugd/b8c837_07fff8613603400091fccc9ee53c5e35.pdf
    • https://static.usrfiles.com/ugd/80bfa9_19c2462f623d4d3bb43c9bce5b592e09.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/94020328862.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/xudijijifabezokojit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/69996807889.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5129/files/53271019578.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/critical_theory_of_communication_in_organizations.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_8ee618d59f0649b39b65128856c9ceb2.pdf
    • https://static.usrfiles.com/ugd/18f527_5792b6bbbab44f25913676a0d796df9d.pdf
    • https://static.usrfiles.com/ugd/63d3ad_c05fb7334ff349269e0a469ae059a390.pdf
    • https://static.usrfiles.com/ugd/1f5cef_c4ca1c86284f4c259f1346faf8e1737a.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_d831880095bd4f94a084af37db8e0a51.pdf
    • https://cdn.shopify.com/s/files/1/0437/4786/8826/files/1404305338.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/55564769709.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1539/files/beethoven_symphony_9_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/milan_italy_city_guide.pdf
    • https://cdn.shopify.com/s/files/1/0461/9026/4469/files/judej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631e.bin
bab96c4d6034c240c4b9bdb5fc817a776e6cbd3e039274b63aa19e1e42c42939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 5352 bytes
font_01_sfnt_off00007547.bin
381e291a8bff45ef2c3b0d795ed0d87c789a26847383f72ae03aaa61a11241f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7547 13936 bytes
font_02_sfnt_off0000a0e6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E6 4324 bytes

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