Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ce6dc9c0404a79…

MALICIOUS

PDF

58.1 KB Created: 2020-08-12 14:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac76097980fb466751a5fb777bc4bcbc SHA-1: 93b6271dc0d134351290d49e7120d6be60973e17 SHA-256: 23ce6dc9c0404a79510f0f87f951916fa2c810607a0caaed065950f37a44f252
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious domain, disguised as a manual for an Omron M7 device. This is further supported by heuristics indicating a malicious redirector link and a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the target URL and other embedded URLs, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/wb?keyword=omron%20m7%20hem-780-e%20manual
    • http://logon.newhorizonperuvians.com/uploads/1/3/1/3/131380600/sebanomusirisaj_pememisejewara_bodavunewato_bokubodupasis.pdf
    • http://files.sexywaterfishing.com/uploads/1/3/1/6/131606755/naxexesuzumem.pdf
    • http://files.beulahlandbiblecamp.org/uploads/1/3/0/7/130739809/48c4f.pdf
    • http://files.gailshortwrites.com/uploads/1/3/0/9/130969984/8757968.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/kavelimupasabotib.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/acuerdo_de_confidencialidad_nda.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3770/files/ridukodurexogutosazuwuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/23350378542.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/72673999214.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3479/files/65757240406.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/d_d_5th_edition_character_sheet_editable.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/24791892461.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/sigabovovelalirolagujuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/electro_pneumatic_actuator.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078fd.bin
03eeec7ce871280bd497c680b65b46004a34c83d1b91692ccdfbd074e34ad7e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FD 3336 bytes
font_01_sfnt_off000084dc.bin
8a2cf9143f3c684dff16d529d6a8a9b0989c322686112c625a55c7dfa7b5da66
pdf-font-stream PDF embedded font (sfnt) at offset 0x84DC 5220 bytes
font_02_sfnt_off00009672.bin
487c6e41f8a65b061d47a9fb688c48a66c325ac10c7b938bfbc35c81a36a67e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9672 15496 bytes
font_03_sfnt_off0000c654.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC654 16092 bytes