Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab2b01d23249b03…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 11:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 482c08d740ea5459b401efb0a4a40056 SHA-1: 71f17cabcde08c78449ebe66f8eeb69c37909cf2 SHA-256: 5ab2b01d23249b0355c713c15bd06d921587d8be234b847bb48896ce92c132e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=rosewill+usb+3.+0+driver', which is flagged as a malicious redirector. This suggests the document is part of a link farm designed to lead users to malicious sites, likely for phishing or malware distribution.

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.club/wix?keyword=rosewill+usb+3.+0+driver
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a18aa6_89a55126d13e480e8c71d8d3e0e2a067.pdf
    • https://static.usrfiles.com/ugd/b8c837_93d019b8bbcd4ebda7b4fe1d0639c6ba.pdf
    • https://static.usrfiles.com/ugd/493135_e5a4b9bca5754e13a8dbf22e5feb5539.pdf
    • https://static.usrfiles.com/ugd/87a178_c24808e8d28144ff91ee26998d9e3d91.pdf
    • https://static.usrfiles.com/ugd/10b11f_9d8a49d55d2c440e90597e06b94dbef9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ad51b6408ef4ed9af97f2a90451d3d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a5154abc534d9fb684c0cba3385b6e.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/photoshop_cs4_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/82442393916.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/cancer_stem_cells_implications_for_cancer_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/joint_commission_accreditation_standards_for_hospitals.pdf
    • https://static.usrfiles.com/ugd/b8c837_6269df8c38474704b9020af4bb0b4d61.pdf
    • https://static.usrfiles.com/ugd/430cb2_1bc84a9d6372409c9702e3e9683ba6b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d0e5eec7444aec95b8c0c306ace257.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff9.bin
e26858be4841982f93df7f771a26f0b92ea9b301dc8b1dc70643f564ae465970
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 5248 bytes
font_01_sfnt_off000071f1.bin
5a1acf18762b40c664392c0e1b4d01a2e9c00491c3c1347a88c982c61528da02
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 11052 bytes