Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96d0baa0f1c2a7e…

MALICIOUS

PDF

52.8 KB Created: 2020-08-10 15:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de14ba45320050c9ce83e0425c4c933 SHA-1: 9f2390744a25596d3fc6a3f6ac80aec88092b9a5 SHA-256: b96d0baa0f1c2a7e6223acb3ec089c64598f3dc84b0e1400400fd26d94c78bfd
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to legal documents and the malicious URL itself. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute the malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=duty+of+care+in+negligence+tort+law+pdf
    • http://files.joetomasovsky.com/uploads/1/3/0/8/130814858/xilugogotuko-poberopi-ninuma-zagofa.pdf
    • http://wesujum.abigailcrscott.com/uploads/1/3/1/3/131383478/kopuxabu_domonurenufa_vixev_jupavibox.pdf
    • http://fuwufoj.quantum-packaging.com/uploads/1/3/0/7/130738524/taxetolu-virokarug-jovuxu-gapedinaxudefu.pdf
    • http://files.encognize.com/uploads/1/3/1/4/131453188/18f59.pdf
    • http://xejetati.wargamer-painter.com/uploads/1/3/0/7/130775432/22186.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/63846539199.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/esxi_shutdown_vm_from_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/wunoxorej.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/73220901076.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/gikonugegibase.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/perepowuzanebor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7536/1178/files/88839962414.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/lasujegogumixumiwoxudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/historia_del_materialismo_dialectico.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_off0000905f.bin
8960f17c12731465f4c948d003bd01258aadf07f166228df410082b6d62d66da
pdf-font-stream PDF embedded font (sfnt) at offset 0x905F 5340 bytes
font_01_sfnt_off0000a2b5.bin
9028ed892a95ac0b5d845ac63ed7f07579b614097c241a6803126b3da6f8b0ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B5 10404 bytes