Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff3767a8483d5e3…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 13:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 395bcc87ed81a8d990da9abb3f6c213a SHA-1: bb975ddaa0dbcab5f3e21a584d1ef28c47760d77 SHA-256: 8ff3767a8483d5e3dda6bd95832c4774bf377fafac11012a63ad98dea1858db1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of embedded links, many hosted on Shopify, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://ttraff.com/wix?keyword=import+javax.+swing.+joptionpane, which is likely used to redirect users to a harmful site.

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.com/wix?keyword=import+javax.+swing.+joptionpane
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/86973529666.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/rejikeru.pdf
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/nabuwuxuliwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/74963843598.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/19128801797.pdf
    • https://cdn.shopify.com/s/files/1/0463/3971/9324/files/degrees_and_radians_conversion_pract.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/96909678353.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/28875180823.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8800/files/negufuludaxejojexutavobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/xebefadefojiloka.pdf
    • https://cdn.shopify.com/s/files/1/0429/1874/0134/files/controls_and_variables_part_1_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/52979923171.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_2dfed89e5c7248469ee5822c61bfc44f.pdf
    • https://static.usrfiles.com/ugd/38bf1f_89a6933ce9804a3e8db5ec8bc6340445.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_off00005cbd.bin
61b268d23c6b79cd172bad2ba44efc48b588f4c5662e3186ddfd1d980cdc19af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 5160 bytes
font_01_sfnt_off00006e47.bin
a1e49f872be53b7d5f4ff97353f26ed62b5e47c12d447c92b1fc0323cdde26fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 15104 bytes
font_02_sfnt_off00009984.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9984 4324 bytes

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