Malicious PDF — malware analysis report

Static analysis result for SHA-256 364437853ff59754…

MALICIOUS

PDF

39.7 KB Created: 2020-08-30 13:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 128124a3edcb86f39d4ace5fc6503883 SHA-1: 2a2eaa8c737c913d0b3bdd22c289787718fc1e47 SHA-256: 364437853ff5975486cef57bcea6899239374bcdeab187fce509976fe0f8070c
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to host other PDFs. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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.com/wix?keyword=cronica+ilustrada+revolucion+mexican
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/55092139279.pdf
    • https://cdn.shopify.com/s/files/1/0437/4600/1045/files/capillary_gel_electrophoresis.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/40014200561.pdf
    • https://cdn.shopify.com/s/files/1/0434/1628/9447/files/hollywood_actresses_images.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/jubukuzupuz.pdf
    • https://static.usrfiles.com/ugd/b8c837_e84c15c12f9e4d40a939c7ea81608acc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c51e1c9b1d3b42b285be0c176583e626.pdf
    • https://static.usrfiles.com/ugd/b8c837_841b51e9e56641518f1ee9788556fad4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f6e7560c76046b39e6c2e43fc9f667f.pdf
    • https://static.usrfiles.com/ugd/87a178_8f628de48a4b47888bb5f81de1e74817.pdf
    • https://static.usrfiles.com/ugd/76156b_4eccac0064e748d7b6409f0967637fa8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ccc27ae87d3470b8452156fc45d0996.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_6ee478bb39014375a4c83e7f81b7add5.pdf
    • https://static.usrfiles.com/ugd/9904c2_6d9489ef188344e18bbb12c1be401a46.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f47abcdb9904945a9c1c2bf44638d6d.pdf
    • https://static.usrfiles.com/ugd/b916f4_e37504be54c040cfbe090cab86ad2b7b.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_off00005144.bin
64949d18057811419126732c1a9d0712086608abeea72a3cdb5107dcc1c52c00
pdf-font-stream PDF embedded font (sfnt) at offset 0x5144 5120 bytes
font_01_sfnt_off0000628f.bin
3c1c23cbc2347d48efcec79093a2e66a43b4ec32883df504c577b350b5e3a0fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 15204 bytes