Malicious PDF — malware analysis report

Static analysis result for SHA-256 f668a50e149ca246…

MALICIOUS

PDF

66.2 KB Created: 2020-07-10 18:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d632f309a20b482c0efda7804de8deed SHA-1: 33efaf94cf84b1da9136300560053578b6a8861c SHA-256: f668a50e149ca2460212c53da6d7753d0a9fb0603d4df7eefe11ed57f99267e2
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links redirects to a known malicious redirector, ttraff.com, suggesting a phishing or malware distribution attempt. The document body, though partially garbled, includes the title 'Ethical issues in research methodology pdf', likely a lure to entice users to click the malicious links. The ML classifier 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.com/wb?keyword=ethical%20issues%20in%20research%20methodology%20pdf
    • http://files.unidadepastoral.com/uploads/1/3/1/4/131437351/195585ef.pdf
    • http://files.andreakantrowitz.com/uploads/1/3/1/1/131164524/6412549.pdf
    • http://files.aphroditeprojectbirth.com/uploads/1/3/1/0/131070485/xoxudinuwilalujexa.pdf
    • http://files.3dudesphotobooth.us/uploads/1/3/0/9/130968995/8897219.pdf
    • http://files.sacpb.org/uploads/1/3/0/9/130969140/62af4337f1b5ba1.pdf
    • http://files.thegreatalpacaplace.com/uploads/1/3/2/6/132682293/kemosalok.pdf
    • http://files.dublinarabicfilmfestival.com/uploads/1/3/1/4/131453241/b1f7cd06d4474ff.pdf
    • http://files.sampriti.us/uploads/1/3/1/8/131858975/xakasagaputun_webirupuwi_liwalamidoru.pdf
    • https://bazaroguj.files.wordpress.com/2020/06/91473717390.pdf
    • https://boxubiriso.files.wordpress.com/2020/06/40228530747.pdf
    • https://savuwasewu.files.wordpress.com/2020/07/woregakanevanabasu.pdf
    • https://pegovozizow.files.wordpress.com/2020/06/78627754914.pdf
    • https://xabopiwas.files.wordpress.com/2020/07/22288352328.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/mimasisoropixibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.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_off0000c32b.bin
0e971f41adaa432b13dc85cada18b02ef5bce35bbf467383ea60f4eed73bca2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC32B 5508 bytes
font_01_sfnt_off0000d5b8.bin
09568a82e7adcf6ec2767aa68b4080e69a86b8f1a75df9a1a17ad1a06b656899		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 11792 bytes

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